Mail for domain not showing in Virtualmin > System Settings > Server Templates.

Hi,
I’m trying to setup an email format of user@domain.tld rather than the standard Virtualmin joe.virtualmin.

I followed the Virtualmin instructions https://www.virtualmin.com/documentation/email/pop-and-imap and went to
Virtualmin > System Settings > Server Templates,
however there should be an option called Mail for domain.
There is no Mail for domain there?

Mail for domain is enabled in Virtualmin > Edit Virtual Server > Enabled features.

I tried these to forum posts too, however there is no email address to send a test email to, like user@domain.tld.
https://www.virtualmin.com/node/30046
https://www.virtualmin.com/node/30051

I have created a new email account using
Virtualmin > Edit Users > Add a user to this server. > entered the email address, full name and password > Create,
however the result is a name called test and a login test.domain.
How do I send an email to test.domain as I sent an email to test@domain.tld, but I can’t access the test@domain.tld webmail box?

I tried accessing test@domain.tld by going to https://LAN_IP:20000 > Username: test@domain.tld > Password: password > Login,
however an error: Failed to login to IMAP server : [AUTHENTICATIONFAILED] Authentication failed.

Any help please on how to setup the user@domain.tld email please?

Okay, I was able to login to Username using username: test.domain rather than test@domain.tld.
After logging in with test.domain, I can now also log in with test@domain.tld.

However, there is no test email I sent to test@domain.tld?

http://www.virtualmin.com/documentation/id,webmail_and_virtualmin/#webmail_and_virtualmin says Usermin uses IMAP server by default if Dovecot is running and properly configured.
I am using whatever the default configuration is, so if I need to configure something, I can’t find any instructions how to?

I checked the Virtualmin mail logs in /var/log/maillog. Here is some of the log errors. I couldn’t paste all of the logs as it’s 2710 lines of code from 5065-7775:
1st part of log files:

Nov 27 08:04:02 localhost dovecot: master: Dovecot v2.0.9 starting up (core dumps disabled)
Nov 27 08:04:07 localhost postfix/postfix-script[1900]: starting the Postfix mail system
Nov 27 08:04:07 localhost postfix/master[1901]: daemon started -- version 2.6.6, configuration /etc/postfix
Nov 27 08:04:08 localhost postfix/qmgr[1910]: 3F8CCFE45: from=<domain@centos.com>, size=1373, nrcpt=1 (queue active)
Nov 27 08:04:08 localhost postfix/qmgr[1910]: 36DB713497: from=<domain@centos.com>, size=1419, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 3D16410331: from=<domain@centos.com>, size=1384, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 3609110333: from=<domain@centos.com>, size=1405, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: C663C1346C: from=<domain@centos.com>, size=1385, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: CD7731349C: from=<domain@centos.com>, size=1419, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: C9FC613494: from=<domain@centos.com>, size=1422, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: CE6DA1348A: from=<domain@centos.com>, size=1420, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 755CF12726: from=<domain@centos.com>, size=1399, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 6A15613498: from=<domain@centos.com>, size=1414, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 6A08D13486: from=<domain@centos.com>, size=1415, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 69E9AD0CD: from=<domain@centos.com>, size=1414, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 11B2A12E74: from=<domain@centos.com>, size=1404, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 195091348B: from=<domain@centos.com>, size=1419, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 19C521348D: from=<domain@centos.com>, size=1419, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 1A0261348C: from=<domain@centos.com>, size=1417, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 154E413499: from=<domain@centos.com>, size=1416, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 0159E10334: from=<domain@centos.com>, size=1416, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 04C4A13490: from=<domain@centos.com>, size=1417, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: A00A51349F: from=<domain@centos.com>, size=1418, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: EC74F1349D: from=<domain@centos.com>, size=1420, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: EDE10F834: from=<domain@centos.com>, size=1379, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 8E118102A6: from=<domain@centos.com>, size=1418, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 8D34813491: from=<domain@centos.com>, size=1421, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 5A37D13496: from=<domain@centos.com>, size=1416, nrcpt=1 (queue active)
Nov 27 08:04:09 localhost postfix/qmgr[1910]: 52A80100CD: from=<domain@centos.com>, size=1400, nrcpt=1 (queue active)
Nov 27 08:04:10 localhost postfix/qmgr[1910]: 551F3FE32: from=<domain@centos.com>, size=1376, nrcpt=1 (queue active)
Nov 27 08:04:10 localhost postfix/qmgr[1910]: 4F24410337: from=<domain@centos.com>, size=1385, nrcpt=1 (queue active)
Nov 27 08:04:10 localhost postfix/qmgr[1910]: B90DC1348F: from=<domain@centos.com>, size=1415, nrcpt=1 (queue active)
Nov 27 08:04:10 localhost postfix/qmgr[1910]: B48CBE45A: from=<domain@centos.com>, size=1420, nrcpt=1 (queue active)
Nov 27 08:04:11 localhost postfix/smtp[1921]: connect to gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 08:04:11 localhost postfix/smtp[1913]: connect to gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 08:04:11 localhost postfix/smtp[1915]: connect to gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 08:04:11 localhost postfix/smtp[1918]: connect to gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 08:04:11 localhost postfix/smtp[1919]: connect to gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 08:04:11 localhost postfix/smtp[1914]: 3D16410331: host mailin-01.mx.aol.com[205.188.159.42] refused to talk to me: 554- (RTR:DU)  http://postmaster.info.aol.com/errors/554rtrdu.html 554  Connecting IP: 124.191.169.67
Nov 27 08:04:11 localhost postfix/smtp[1917]: CD7731349C: host mailin-02.mx.aol.com[64.12.137.162] refused to talk to me: 554- (RTR:DU)  http://postmaster.info.aol.com/errors/554rtrdu.html 554  Connecting IP: 124.191.169.67
Nov 27 08:04:12 localhost postfix/smtp[1912]: 3F8CCFE45: host mailin-02.mx.aol.com[64.12.88.164] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html
Nov 27 08:04:12 localhost postfix/smtp[1917]: CD7731349C: host mailin-03.mx.aol.com[64.12.91.196] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html
Nov 27 08:04:12 localhost postfix/smtp[1923]: connect to ymail.net[222.231.2.126]:25: Connection refused
Nov 27 08:04:12 localhost postfix/smtp[1914]: 3D16410331: host mailin-01.mx.aol.com[205.188.155.110] refused to talk to me: 554- (RTR:DU)  http://postmaster.info.aol.com/errors/554rtrdu.html 554  Connecting IP: 124.191.169.67
Nov 27 08:04:12 localhost postfix/smtp[1916]: C663C1346C: host mailin-04.mx.aol.com[64.12.88.132] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html
Nov 27 08:04:12 localhost postfix/smtp[1915]: 3609110333: host gmail-smtp-in.l.google.com[74.125.129.26] said: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that 450-4.2.1 prevents additional messages from being delivered. Please resend your 450-4.2.1 message at a later time. If the user is able to receive mail at that 450-4.2.1 time, your message will be delivered. For more information, please 450 4.2.1 visit http://support.google.com/mail/bin/answer.py?answer=6592 v7si31816841pbi.68 - gsmtp (in reply to RCPT TO command)
Nov 27 08:04:12 localhost postfix/smtp[1920]: 755CF12726: host mailin-02.mx.aol.com[64.12.88.163] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html
Nov 27 08:04:12 localhost postfix/smtp[1923]: 4F24410337: to=<velesyandextay@ymail.net>, relay=none, delay=321603, delays=321601/1.5/0.99/0, dsn=4.4.1, status=deferred (connect to ymail.net[222.231.2.126]:25: Connection refused)
Nov 27 08:04:12 localhost postfix/smtp[1915]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 08:04:13 localhost postfix/smtp[1912]: 3F8CCFE45: host mailin-03.mx.aol.com[64.12.91.196] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html
Nov 27 08:04:13 localhost postfix/smtp[1914]: 3D16410331: host mailin-01.mx.aol.com[64.12.91.195] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html
Nov 27 08:04:13 localhost postfix/smtp[1916]: C663C1346C: host mailin-02.mx.aol.com[64.12.91.195] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html

Last part of log files:

Nov 27 15:04:14 localhost postfix/smtp[26670]: 3609110333: host gmail-smtp-in.l.google.com[74.125.129.27] said: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that 450-4.2.1 prevents additional messages from being delivered. Please resend your 450-4.2.1 message at a later time. If the user is able to receive mail at that 450-4.2.1 time, your message will be delivered. For more information, please 450 4.2.1 visit http://support.google.com/mail/bin/answer.py?answer=6592 it5si32703922pbc.95 - gsmtp (in reply to RCPT TO command)
Nov 27 15:04:14 localhost postfix/smtp[26669]: 3D16410331: host mailin-02.mx.aol.com[64.12.137.162] refused to talk to me: 554- (RTR:DU)  http://postmaster.info.aol.com/errors/554rtrdu.html 554  Connecting IP: WAN IP
Nov 27 15:04:14 localhost postfix/smtp[26678]: 2015113492: host gmail-smtp-in.l.google.com[74.125.129.27] said: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that 450-4.2.1 prevents additional messages from being delivered. Please resend your 450-4.2.1 message at a later time. If the user is able to receive mail at that 450-4.2.1 time, your message will be delivered. For more information, please 450 4.2.1 visit http://support.google.com/mail/bin/answer.py?answer=6592 n5si32680877pav.69 - gsmtp (in reply to RCPT TO command)
Nov 27 15:04:14 localhost postfix/smtp[26675]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1a]:25: Network is unreachable
Nov 27 15:04:14 localhost postfix/smtp[26679]: AAFE613485: host gmail-smtp-in.l.google.com[74.125.129.27] said: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that 450-4.2.1 prevents additional messages from being delivered. Please resend your 450-4.2.1 message at a later time. If the user is able to receive mail at that 450-4.2.1 time, your message will be delivered. For more information, please 450 4.2.1 visit http://support.google.com/mail/bin/answer.py?answer=6592 tr4si4298736pab.92 - gsmtp (in reply to RCPT TO command)
Nov 27 15:04:14 localhost postfix/smtp[26670]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1a]:25: Network is unreachable
Nov 27 15:04:14 localhost postfix/smtp[26678]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1a]:25: Network is unreachable
Nov 27 15:04:14 localhost postfix/smtp[26196]: 3F8CCFE45: host mailin-04.mx.aol.com[64.12.91.196] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html
Nov 27 15:04:14 localhost postfix/smtp[26679]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1a]:25: Network is unreachable
Nov 27 15:04:14 localhost postfix/smtp[26681]: connect to ymail.net[222.231.2.126]:25: Connection refused
Nov 27 15:04:14 localhost postfix/smtp[26681]: 4F24410337: to=<velesyandextay@ymail.net>, relay=none, delay=346806, delays=346803/1.4/1.1/0, dsn=4.4.1, status=deferred (connect to ymail.net[222.231.2.126]:25: Connection refused)
Nov 27 15:04:14 localhost postfix/smtp[26677]: 2A797134B1: host gmail-smtp-in.l.google.com[74.125.129.27] said: 450-4.2.1 The user you are trying to contact is receiving mail too quickly. 450-4.2.1 Please resend your message at a later time. If the user is able to 450-4.2.1 receive mail at that time, your message will be delivered. For more 450-4.2.1 information, please visit 450 4.2.1 http://support.google.com/mail/bin/answer.py?answer=6592 bt3si10901726pbb.224 - gsmtp (in reply to RCPT TO command)
Nov 27 15:04:14 localhost postfix/smtp[26674]: 755CF12726: host mailin-03.mx.aol.com[64.12.88.163] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html
Nov 27 15:04:15 localhost postfix/smtp[26677]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1a]:25: Network is unreachable
Nov 27 15:04:15 localhost postfix/smtp[26673]: CD7731349C: host mailin-03.mx.aol.com[205.188.156.193] refused to talk to me: 554- (RTR:DU)  http://postmaster.info.aol.com/errors/554rtrdu.html 554  Connecting IP: WAN IP
ov 27 15:04:15 localhost postfix/smtp[26672]: C663C1346C: host mailin-04.mx.aol.com[64.12.88.131] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html
Nov 27 15:04:15 localhost postfix/smtp[26669]: 3D16410331: host mailin-01.mx.aol.com[205.188.159.42] refused to talk to me: 554- (RTR:DU)  http://postmaster.info.aol.com/errors/554rtrdu.html 554  Connecting IP: WAN IP
Nov 27 15:04:15 localhost postfix/smtp[26674]: 755CF12726: host mailin-02.mx.aol.com[64.12.88.163] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html
Nov 27 15:04:15 localhost postfix/smtp[26680]: 551F3FE32: host mx00.gmx.com[74.208.5.4] refused to talk to me: 554-gmx.net (mxgmxus003) Nemesis ESMTP Service not available 554-No SMTP service 554-IP address is black listed. 554 For explanation visit http://postmaster.gmx.com/en/error-messages?ip=WAN IP&c=bl
Nov 27 15:04:15 localhost postfix/smtp[26196]: 3F8CCFE45: host mailin-02.mx.aol.com[64.12.137.162] refused to talk to me: 554- (RTR:DU)  http://postmaster.info.aol.com/errors/554rtrdu.html 554  Connecting IP: WAN IP
Nov 27 15:04:16 localhost postfix/smtp[26678]: 2015113492: to=<s.h2.6.4.8.z.he6.58j.x.d123.h.q@gmail.com>, relay=alt1.gmail-smtp-in.l.google.com[74.125.142.27]:25, delay=17208, delays=17204/1/2/0.53, dsn=4.2.1, status=deferred (host alt1.gmail-smtp-in.l.google.com[74.125.142.27] said: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that 450-4.2.1 prevents additional messages from being delivered. Please resend your 450-4.2.1 message at a later time. If the user is able to receive mail at that 450-4.2.1 time, your message will be delivered. For more information, please 450 4.2.1 visit http://support.google.com/mail/bin/answer.py?answer=6592 nr6si25810732igb.49 - gsmtp (in reply to RCPT TO command))
Nov 27 15:04:16 localhost postfix/smtp[26670]: 3609110333: to=<d.u.r.dd.d.dd.d.d.dd@gmail.com>, relay=alt1.gmail-smtp-in.l.google.com[74.125.142.27]:25, delay=194030, delays=194026/0.29/2.9/0.54, dsn=4.2.1, status=deferred (host alt1.gmail-smtp-in.l.google.com[74.125.142.27] said: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that 450-4.2.1 prevents additional messages from being delivered. Please resend your 450-4.2.1 message at a later time. If the user is able to receive mail at that 450-4.2.1 time, your message will be delivered. For more information, please 450 4.2.1 visit http://support.google.com/mail/bin/answer.py?answer=6592 vu5si25813763igc.43 - gsmtp (in reply to RCPT TO command))
Nov 27 15:04:16 localhost postfix/smtp[26673]: CD7731349C: host mailin-01.mx.aol.com[205.188.155.110] refused to talk to me: 554- (RTR:DU)  http://postmaster.info.aol.com/errors/554rtrdu.html 554  Connecting IP: WAN IP
Nov 27 15:04:16 localhost postfix/smtp[26672]: C663C1346C: host mailin-02.mx.aol.com[64.12.139.193] refused to talk to me: 554- (RTR:DU)  http://postmaster.info.aol.com/errors/554rtrdu.html 554  Connecting IP: WAN IP
Nov 27 15:04:16 localhost postfix/smtp[26679]: AAFE613485: to=<s.h.2648.zh.e.65.8jx.d12.3h.q@gmail.com>, relay=alt1.gmail-smtp-in.l.google.com[74.125.142.27]:25, delay=21514, delays=21510/1.2/2/0.5, dsn=4.2.1, status=deferred (host alt1.gmail-smtp-in.l.google.com[74.125.142.27] said: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that 450-4.2.1 prevents additional messages from being delivered. Please resend your 450-4.2.1 message at a later time. If the user is able to receive mail at that 450-4.2.1 time, your message will be delivered. For more information, please 450 4.2.1 visit http://support.google.com/mail/bin/answer.py?answer=6592 lz8si36365465icc.112 - gsmtp (in reply to RCPT TO command))
Nov 27 15:04:16 localhost postfix/smtp[26669]: 3D16410331: host mailin-02.mx.aol.com[64.12.88.164] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html
Nov 27 15:04:16 localhost postfix/smtp[26675]: 79412134B3: to=<sh.26.48.z.h.e.6.5.8jx.d1.23h.q@gmail.com>, relay=alt1.gmail-smtp-in.l.google.com[74.125.142.27]:25, delay=502, delays=498/0.67/2.4/0.94, dsn=4.2.1, status=deferred (host alt1.gmail-smtp-in.l.google.com[74.125.142.27] said: 450-4.2.1 The user you are trying to contact is receiving mail too quickly. 450-4.2.1 Please resend your message at a later time. If the user is able to 450-4.2.1 receive mail at that time, your message will be delivered. For more 450-4.2.1 information, please visit 450 4.2.1 http://support.google.com/mail/bin/answer.py?answer=6592 d4si25831291igr.0 - gsmtp (in reply to RCPT TO command))
Nov 27 15:04:16 localhost postfix/smtp[26674]: 755CF12726: host mailin-01.mx.aol.com[205.188.159.42] refused to talk to me: 554- (RTR:DU)  http://postmaster.info.aol.com/errors/554rtrdu.html 554  Connecting IP: WAN IP
Nov 27 15:04:16 localhost postfix/smtp[26676]: connect to gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 15:04:16 localhost postfix/smtp[26673]: CD7731349C: to=<udonthavetobeashell@aol.com>, relay=mailin-03.mx.aol.com[64.12.88.164]:25, delay=88583, delays=88579/0.47/3.8/0, dsn=4.7.1, status=deferred (host mailin-03.mx.aol.com[64.12.88.164] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html)
Nov 27 15:04:16 localhost postfix/smtp[26677]: 2A797134B1: to=<s.h2648z.h.e6.5.8j.x.d.1.23.h.q@gmail.com>, relay=alt1.gmail-smtp-in.l.google.com[74.125.142.27]:25, delay=1047, delays=1042/0.91/2.5/0.82, dsn=4.2.1, status=deferred (host alt1.gmail-smtp-in.l.google.com[74.125.142.27] said: 450-4.2.1 The user you are trying to contact is receiving mail too quickly. 450-4.2.1 Please resend your message at a later time. If the user is able to 450-4.2.1 receive mail at that time, your message will be delivered. For more 450-4.2.1 information, please visit 450 4.2.1 http://support.google.com/mail/bin/answer.py?answer=6592 q10si25829488ign.5 - gsmtp (in reply to RCPT TO command))
Nov 27 15:04:16 localhost postfix/pickup[25074]: A29F2134B7: uid=502 from=<domain>
Nov 27 15:04:16 localhost postfix/cleanup[26254]: A29F2134B7: message-id=<16855c7911a10a77e8881e8a7691a18c@localhost>
Nov 27 15:04:16 localhost postfix/qmgr[1910]: A29F2134B7: from=<domain@centos.com>, size=1399, nrcpt=1 (queue active)
Nov 27 15:04:16 localhost postfix/smtp[26672]: C663C1346C: to=<ddshre@aol.com>, relay=mailin-04.mx.aol.com[64.12.91.196]:25, delay=339611, delays=339607/0.39/4/0, dsn=4.7.1, status=deferred (host mailin-04.mx.aol.com[64.12.91.196] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html)
Nov 27 15:04:16 localhost postfix/smtp[26680]: 551F3FE32: to=<tyzba1@mail.com>, relay=mx01.gmx.com[74.208.5.27]:25, delay=252511, delays=252507/1.3/3/0, dsn=4.0.0, status=deferred (host mx01.gmx.com[74.208.5.27] refused to talk to me: 554-gmx.net (mxgmxus001) Nemesis ESMTP Service not available 554-No SMTP service 554-IP address is black listed. 554 For explanation visit http://postmaster.gmx.com/en/error-messages?ip=WAN IP&c=bl)
Nov 27 15:04:16 localhost postfix/smtp[26669]: 3D16410331: to=<jknkd@aol.com>, relay=mailin-02.mx.aol.com[64.12.88.163]:25, delay=182980, delays=182975/0.18/4.4/0, dsn=4.7.1, status=deferred (host mailin-02.mx.aol.com[64.12.88.163] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html)
Nov 27 15:04:16 localhost postfix/error[26689]: EDE10F834: to=<thoshl960@aol.com>, relay=none, delay=262970, delays=262966/4.5/0/0.01, dsn=4.7.1, status=deferred (delivery temporarily suspended: host mailin-02.mx.aol.com[64.12.88.163] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html)
Nov 27 15:04:17 localhost postfix/smtp[26674]: 755CF12726: to=<thebestishere555@aol.com>, relay=mailin-02.mx.aol.com[64.12.139.193]:25, delay=344537, delays=344532/0.54/4.3/0, dsn=4.0.0, status=deferred (host mailin-02.mx.aol.com[64.12.139.193] refused to talk to me: 554- (RTR:DU)  http://postmaster.info.aol.com/errors/554rtrdu.html 554  Connecting IP: WAN IP)
Nov 27 15:04:17 localhost postfix/smtp[26681]: A29F2134B7: to=<ugaldetpsad@hotmail.com>, relay=mx2.hotmail.com[65.55.37.88]:25, delay=1.3, delays=0.02/0.2/0.87/0.2, dsn=5.0.0, status=bounced (host mx2.hotmail.com[65.55.37.88] said: 550 OU-002 (COL0-MC2-F9) Unfortunately, messages from WAN IP weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. (in reply to MAIL FROM command))
Nov 27 15:04:17 localhost postfix/smtp[26681]: A29F2134B7: lost connection with mx2.hotmail.com[65.55.37.88] while sending RCPT TO
Nov 27 15:04:17 localhost postfix/cleanup[26254]: E6B71134B8: message-id=<20131127050417.E6B71134B8@centos.com>
Nov 27 15:04:17 localhost postfix/qmgr[1910]: E6B71134B8: from=<>, size=3772, nrcpt=1 (queue active)
Nov 27 15:04:17 localhost postfix/bounce[26640]: A29F2134B7: sender non-delivery notification: E6B71134B8
Nov 27 15:04:17 localhost postfix/qmgr[1910]: A29F2134B7: removed
Nov 27 15:04:18 localhost postfix/smtp[26676]: BC18D134AF: host gmail-smtp-in.l.google.com[74.125.129.27] said: 450-4.2.1 The user you are trying to contact is receiving mail too quickly. 450-4.2.1 Please resend your message at a later time. If the user is able to 450-4.2.1 receive mail at that time, your message will be delivered. For more 450-4.2.1 information, please visit 450 4.2.1 http://support.google.com/mail/bin/answer.py?answer=6592 sl10si3627877pab.244 - gsmtp (in reply to RCPT TO command)
Nov 27 15:04:18 localhost postfix/smtp[26676]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1a]:25: Network is unreachable
Nov 27 15:04:19 localhost postfix/smtp[26676]: BC18D134AF: to=<sh.2.6.48z.he.6.58.jx.d.1.23.hq@gmail.com>, relay=alt1.gmail-smtp-in.l.google.com[74.125.142.27]:25, delay=2116, delays=2109/3.8/2.7/0.83, dsn=4.2.1, status=deferred (host alt1.gmail-smtp-in.l.google.com[74.125.142.27] said: 450-4.2.1 The user you are trying to contact is receiving mail too quickly. 450-4.2.1 Please resend your message at a later time. If the user is able to 450-4.2.1 receive mail at that time, your message will be delivered. For more 450-4.2.1 information, please visit 450 4.2.1 http://support.google.com/mail/bin/answer.py?answer=6592 f7si25805111igg.64 - gsmtp (in reply to RCPT TO command))
Nov 27 15:04:21 localhost postfix/smtp[26196]: 3F8CCFE45: to=<amba@aol.com>, relay=mailin-03.mx.aol.com[149.174.159.98]:25, delay=244428, delays=244419/0.11/9.4/0, dsn=4.7.1, status=deferred (host mailin-03.mx.aol.com[149.174.159.98] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html)
Nov 27 15:04:50 localhost postfix/local[26258]: 2405E134B6: to=<domain@centos.com>, relay=local, delay=50, delays=0.01/0/0/50, dsn=2.0.0, status=sent (delivered to command: /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME)
Nov 27 15:04:50 localhost postfix/qmgr[1910]: 2405E134B6: removed
Nov 27 15:04:59 localhost postfix/local[26514]: E6B71134B8: to=<domain@centos.com>, relay=local, delay=41, delays=0.01/0/0/41, dsn=2.0.0, status=sent (delivered to command: /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME)
Nov 27 15:04:59 localhost postfix/qmgr[1910]: E6B71134B8: removed
Nov 27 15:07:38 localhost postfix/scache[26686]: statistics: start interval Nov 27 15:04:16
Nov 27 15:07:38 localhost postfix/scache[26686]: statistics: domain lookup hits=0 miss=1 success=0%
Nov 27 15:07:38 localhost postfix/scache[26686]: statistics: address lookup hits=0 miss=4 success=0%
Nov 27 15:07:38 localhost postfix/scache[26686]: statistics: max simultaneous domains=1 addresses=2 connection=2
Nov 27 15:09:12 localhost postfix/qmgr[1910]: 63B54134A0: from=<domain@centos.com>, size=1419, nrcpt=1 (queue active)
Nov 27 15:09:12 localhost postfix/qmgr[1910]: 9E782134AB: from=<domain@centos.com>, size=1420, nrcpt=1 (queue active)
Nov 27 15:09:12 localhost postfix/qmgr[1910]: EC77A102A6: from=<domain@centos.com>, size=1417, nrcpt=1 (queue active)
Nov 27 15:09:12 localhost postfix/qmgr[1910]: BC94A1349D: from=<domain@centos.com>, size=1377, nrcpt=1 (queue active)
Nov 27 15:09:12 localhost postfix/error[26987]: BC94A1349D: to=<sjojol@aol.com>, relay=none, delay=1106, delays=1106/0.07/0/0.09, dsn=4.7.1, status=deferred (delivery temporarily suspended: host mailin-02.mx.aol.com[64.12.88.163] refused to talk to me: 554 5.7.1 : (RTR:DU) http://postmaster.info.aol.com/errors/554rtrdu.html)
Nov 27 15:09:12 localhost postfix/smtp[26990]: connect to gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 15:09:12 localhost postfix/smtp[26988]: connect to gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 15:09:12 localhost postfix/smtp[26986]: connect to gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 15:09:14 localhost postfix/smtp[26988]: 9E782134AB: host gmail-smtp-in.l.google.com[74.125.129.26] said: 450-4.2.1 The user you are trying to contact is receiving mail too quickly. 450-4.2.1 Please resend your message at a later time. If the user is able to 450-4.2.1 receive mail at that time, your message will be delivered. For more 450-4.2.1 information, please visit 450 4.2.1 http://support.google.com/mail/bin/answer.py?answer=6592 gn4si32632764pbc.321 - gsmtp (in reply to RCPT TO command)
Nov 27 15:09:14 localhost postfix/smtp[26990]: EC77A102A6: host gmail-smtp-in.l.google.com[74.125.129.26] said: 450-4.2.1 The user you are trying to contact is receiving mail too quickly. 450-4.2.1 Please resend your message at a later time. If the user is able to 450-4.2.1 receive mail at that time, your message will be delivered. For more 450-4.2.1 information, please visit 450 4.2.1 http://support.google.com/mail/bin/answer.py?answer=6592 bt3si10909407pbb.314 - gsmtp (in reply to RCPT TO command)
Nov 27 15:09:14 localhost postfix/smtp[26986]: 63B54134A0: host gmail-smtp-in.l.google.com[74.125.129.26] said: 450-4.2.1 The user you are trying to contact is receiving mail too quickly. 450-4.2.1 Please resend your message at a later time. If the user is able to 450-4.2.1 receive mail at that time, your message will be delivered. For more 450-4.2.1 information, please visit 450 4.2.1 http://support.google.com/mail/bin/answer.py?answer=6592 bt3si10912255pbb.284 - gsmtp (in reply to RCPT TO command)
Nov 27 15:09:14 localhost postfix/smtp[26990]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 15:09:14 localhost postfix/smtp[26988]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 15:09:14 localhost postfix/smtp[26986]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1b]:25: Network is unreachable
Nov 27 15:09:15 localhost postfix/smtp[26990]: EC77A102A6: to=<s.h26.4.8.zh.e65.8jx.d1.23.h.q@gmail.com>, relay=alt1.gmail-smtp-in.l.google.com[74.125.142.26]:25, delay=23402, delays=23398/0.19/2.7/0.42, dsn=4.2.1, status=deferred (host alt1.gmail-smtp-in.l.google.com[74.125.142.26] said: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that 450-4.2.1 prevents additional messages from being delivered. Please resend your 450-4.2.1 message at a later time. If the user is able to receive mail at that 450-4.2.1 time, your message will be delivered. For more information, please 450 4.2.1 visit http://support.google.com/mail/bin/answer.py?answer=6592 if8si23970897icb.132 - gsmtp (in reply to RCPT TO command))
Nov 27 15:09:15 localhost postfix/smtp[26986]: 63B54134A0: to=<s.h264.8.z.he.6.58.j.x.d.1.23h.q@gmail.com>, relay=alt1.gmail-smtp-in.l.google.com[74.125.142.26]:25, delay=8943, delays=8939/0.11/3.2/0.51, dsn=4.2.1, status=deferred (host alt1.gmail-smtp-in.l.google.com[74.125.142.26] said: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that 450-4.2.1 prevents additional messages from being delivered. Please resend your 450-4.2.1 message at a later time. If the user is able to receive mail at that 450-4.2.1 time, your message will be delivered. For more information, please 450 4.2.1 visit http://support.google.com/mail/bin/answer.py?answer=6592 if8si23971123icb.15 - gsmtp (in reply to RCPT TO command))
Nov 27 15:09:16 localhost postfix/smtp[26988]: 9E782134AB: to=<sh.2.6.48z.h.e.6.5.8.jxd.1.2.3h.q@gmail.com>, relay=alt1.gmail-smtp-in.l.google.com[74.125.142.27]:25, delay=4553, delays=4549/0.14/2.9/0.9, dsn=4.2.1, status=deferred (host alt1.gmail-smtp-in.l.google.com[74.125.142.27] said: 450-4.2.1 The user you are trying to contact is receiving mail too quickly. 450-4.2.1 Please resend your message at a later time. If the user is able to 450-4.2.1 receive mail at that time, your message will be delivered. For more 450-4.2.1 information, please visit 450 4.2.1 http://support.google.com/mail/bin/answer.py?answer=6592 g11si25818989igt.68 - gsmtp (in reply to RCPT TO command))

Further troubleshooting suggests the Virtualmin email configuration is correct.
I tried:
http://www.virtualmin.com/documentation/email/troubleshooting
DNS resolution for mail

[root@centos /]# host -t mx domain.com
domain.com mail is handled by 5 mail.domain.com.
[root@centos /]# host mail.domain.com
mail.domain.com has address WAN IP
[root@centos /]# host WAN IP
67.WAN IP.in-addr.arpa domain name pointer CPE-WAN-IP.oxqn1.cha.ISP.com.

Howdy,

It sounds as if port 25 is inaccessible from the Internet.

One possible reason for that is that many ISP’s block port 25. You may want to verify that yours allows traffic on that port.

Another possibility is that if you’re using NAT, your router may not be forwarding port 25 to your server.

-Eric

I received email from gmail saying:
The recipient server did not accept our requests to connect. Learn more at https://support.google.com/mail/answer/7720 [(5)mail.domain.com. [WANIP]:25: Connection timed out]

Virtualmin > Server Configuration > DNS Records > MX - Mail Server, has setting, 5 mail.domain.com.

This is the automatic default Virtualmin settings so I am not sure how the MX records aren’t configured correctly?

www.intodns.com says all my MX Records are good and have a green tick.

Thanks andreychek, it seems the port 25 was probably the issue.
I also had to send out an email from Usermin and email then started coming in after port 25 was forwarded and the initial Usermin email was sent.