Help with Virtualmin/Usermin in email client.

Virtualmin
1

Hi,
I have setup some new email accounts in Virtualmin, which work using Usermin.
When I setup email accounts in an email client, there are errors:
Errors:
mail.domain.com:admin@domain.com. SMTP. Trying to log in to this SMTP account failed. Verify that the username and password are correct.

domain.com. IMAP. Could not connect to thisSMTP server. Check your network connection and that you entered the correct information in the Account preferences. Also verify that the server supports SSL. If it does not, deselect the “Use SSL” checkbox in the Advanced tab of Account preferences.

smtp.domain.com:admin@domain.com. SMTP. Could not connect to thisSMTP server. Check your network connection and that you entered the correct information in the Account preferences. Also verify that the server supports SSL. If it does not, deselect the “Use SSL” checkbox in the Advanced tab of Account preferences.

I suspect there’s a port setting or SSL setting needed in Virtualmin, however I cannot find any instructions to make it work yet.

Any suggestions welcome.

2

When I setup email accounts in an email client with the following settings:

Mail > Preferences > + > select radio button, Add Other Mail Account… > Continue > Full Name: admin@domain.com > Email Address: admin@domain.com > Password: > Create > Next > Account Type: IMAP > Mail Server: mail.domain.com > User Name: admin@domain.com > Password: > Next > Next > (Incoming Mail Server Info) Port: 993 > tick Use SSL > Authentication: Password > Next > (Outgoing Mail Server Info) SMTP Server: smtp.domain.com > User Name: admin@domain.com > Password: > Create.

3

I tried Virtualmin > Server Templates > Defaults Settings > Mail for Domain > Format for usernames that include domain > username@domain > Save and Next > Virtualmin > Edit Users > tick user to be deleted > Delete Selected Users > Yes, Delete Them > Add a user to this server., but same error.

# ps auxw | grep saslauth
root      1827  0.0  0.1  66408  1232 ?        Ss   08:01   0:00 /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -r
root      1829  0.0  0.1  66408  1224 ?        S    08:01   0:00 /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -r
root      1830  0.0  0.1  66408  1224 ?        S    08:01   0:00 /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -r
root      1831  0.0  0.1  66408  1224 ?        S    08:01   0:00 /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -r
root      1832  0.0  0.1  66408  1224 ?        S    08:01   0:00 /usr/sbin/saslauthd -m /var/run/saslauthd -a pam -r
root      9123  0.0  0.0 103248   808 pts/0    S+   14:26   0:00 grep saslauth

Not quite sure if saslfinger will help.
I installed and ran saslfinger with # saslfinger -c

saslfinger - postfix Cyrus sasl configuration Tue Dec  3 15:17:02 EST 2013
version: 1.0.2
mode: client-side SMTP AUTH

-- basics --
Postfix: 2.6.6
System: CentOS release 6.4 (Final)

-- smtp is linked to --
	libsasl2.so.2 => /usr/lib64/libsasl2.so.2 (0x00007fcd4c7c7000)

-- active SMTP AUTH and TLS parameters for smtp --
No active SMTP AUTH and TLS parameters for smtp in main.cf!
SMTP AUTH can't work!
4

Howdy,

You can verify what username to login as by going into Edit Users, and reviewing the “IMAP / POP3 / FTP login” field.

Also, to make sure that SMTPS and Submission are enabled, you can edit your /etc/postfix/master.cf file, and make sure the lines in there beginning with “Submission” and “SMTPS” are uncommented (along with all the lines following them that begin with “-o”.

Then restart Postfix after making any changes to those.

-Eric

5

Thank you for the reply.
Submission and SMTP are uncommented, so no changes needed there I think.

Not sure why but same error, so I’ll keep researching, unless someone else has a suggestion?

6

Okay, so deleted all Virtualmin accounts, set format to user@domain.com and same error.
Logs:

Dec  4 14:26:32 localhost dovecot: imap-login: Login: user=<admin@domain.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=8607, secured
Dec  4 14:26:32 localhost dovecot: imap(admin@domain.com): Connection closed bytes=57/844
Dec  4 14:26:41 localhost postfix/local[8568]: 48C7470A0: to=<admin-domain.com@centos.com>, orig_to=<admin@domain.com>, relay=local, delay=36, delays=1/0.04/0/35, dsn=2.0.0, status=sent (delivered to command: /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME)
Dec  4 14:26:41 localhost postfix/qmgr[1997]: 48C7470A0: removed
Dec  4 14:26:46 localhost dovecot: imap-login: Login: user=<admin@domain.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=8616, secured
Dec  4 14:26:47 localhost postfix/smtpd[8553]: connect from localhost.localdomain[127.0.0.1]
Dec  4 14:26:47 localhost postfix/smtpd[8553]: 0B85C70A0: client=localhost.localdomain[127.0.0.1]
Dec  4 14:26:47 localhost postfix/cleanup[8567]: 0B85C70A0: message-id=<1386131206.8599@domain.com>
Dec  4 14:26:47 localhost postfix/qmgr[1997]: 0B85C70A0: from=<admin@domain.com>, size=702, nrcpt=1 (queue active)
Dec  4 14:26:47 localhost postfix/smtpd[8553]: disconnect from localhost.localdomain[127.0.0.1]
Dec  4 14:26:47 localhost dovecot: imap(admin@domain.com): Connection closed bytes=785/2243
Dec  4 14:27:00 localhost dovecot: imap-login: Login: user=<admin@domain.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=8635, secured
Dec  4 14:27:00 localhost dovecot: imap(admin@domain.com): Connection closed bytes=1107/11696
Dec  4 14:27:14 localhost dovecot: imap-login: Login: user=<admin@domain.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=8678, secured
Dec  4 14:27:15 localhost dovecot: imap(admin@domain.com): Connection closed bytes=1038/9182
Dec  4 14:27:19 localhost dovecot: imap-login: Login: user=<admin@domain.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=8697, secured
Dec  4 14:27:20 localhost dovecot: imap(admin@domain.com): Connection closed bytes=1107/9080
Dec  4 14:27:33 localhost postfix/local[8568]: 0B85C70A0: to=<admin-domain.com@centos.com>, orig_to=<admin@domain.com>, relay=local, delay=47, delays=0.12/0.01/0/46, dsn=2.0.0, status=sent (delivered to command: /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME)
Dec  4 14:27:33 localhost postfix/qmgr[1997]: 0B85C70A0: removed
Dec  4 14:27:34 localhost dovecot: imap-login: Login: user=<admin@domain.com>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=8780, secured
Dec  4 14:27:35 localhost dovecot: imap(admin@domain.com): Connection closed bytes=1038/10075
Dec  4 14:30:00 localhost postfix/qmgr[1997]: 26DC46A9B: from=<admin@domain.com>, size=714, nrcpt=1 (queue active)
Dec  4 14:30:07 localhost postfix/anvil[8565]: statistics: max connection rate 1/60s for (smtp:209.85.128.170) at Dec  4 14:26:04
Dec  4 14:30:07 localhost postfix/anvil[8565]: statistics: max connection count 1 for (smtp:209.85.128.170) at Dec  4 14:26:04
Dec  4 14:30:07 localhost postfix/anvil[8565]: statistics: max cache size 1 at Dec  4 14:26:04
Dec  4 14:30:20 localhost postfix/smtp[8907]: 26DC46A9B: to=<emailAddress@gmail.com>, relay=none, delay=440, delays=420/0.08/20/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=gmail.com type=MX: Host not found, try again)
7

Are you still trying to use your home Internet connection for a server? Because in your first log excerpt I can see bounce messages from Hotmail: they rejected your mail because your IP is blacklisted.

I can’t see any errors though in your last log, what’s the problem there exactly?

8

Okay,
so seems the consistent error is:
Could not connect to this IMAP server. Check your network
connection and that you entered the correct information in the
Account preferences. Also verify that the server supports SSL. If it
does not, deselect the “Use SSL” checkbox in the Advanced tab of
Account preferences.

9

Try telnetting to the server’s IP, port 143 (IMAP) or 993 (IMAPS), from the computer where you’re doing these tests. If that fails, try a traceroute from that computer to the server. Check if Dovecot is listening on those ports on the server, and make sure no firewall is blocking access. If you’re still doing your home-server thing, make sure ports are forwarded correctly and not blocked by your ISP.

And note that - as I said - your IP is on a blacklist. You won’t be able to change that, so if you use this system as your server, you won’t be able to send emails to a number of destinations, here Hotmail.

10

You left your domain in your last post, I checked the IP and it is classified as a residential connection. You can run your own mail server, but to 99% of the internet, the mail you send out will end up either blocked or flagged as SPAM.

Your hostname on your server also seems to be incorrect as well. Your server claims to be “centos.com” which is incorrect and invalid.

Also a lot of residential ISPs block traceroute, it can be used maliciously. So don’t take too much heart in what you see.

I use IntoVPS, they have worldwide locations, and their basic VPS is $10/month. No email problems, and no changing things around when DHCP gives you a new IP. Depends on how much this is worth to you.

11

Thanks.
Telnet failed on 143 and 993, but worked on 25.

telnet domain.com 25
Trying WANIP…
Connected to domain.com.
Excape character is ‘^]’.
220 centos.com ESMTP Postfix
421 4.4.2 centos.com Error: timeout exceeded
Connection closed by foreign host.

telnet domain.com 143
Trying WANIP…
telnet: connect to address WANIP: Operation timed out
telnet: Unable to connect to remote host

telnet domain.com 993
Trying WANIP…
telnet: connect to address WANIP: Operation timed out
telnet: Unable to connect to remote host

Checked iptables in Terminal > localhost > iptables -L -n

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0           udp dpt:20 
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0           udp dpt:21 
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0           udp dpt:53 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:20000 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:10000 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:443 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:80 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:993 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:143 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:995 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:110 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:20 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:21 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:53 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:587 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:25 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:22 
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED 
ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0           
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:22 
REJECT     all  --  0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited 

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
REJECT     all  --  0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited 

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination  
postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
allow_percent_hack = no
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
home_mailbox = Maildir/
html_directory = no
inet_interfaces = all
inet_protocols = all
mail_owner = postfix
mailbox_command = /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME
mailbox_size_limit = 0
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain, localhost, localhost.localdomain
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES
sample_directory = /usr/share/doc/postfix-2.6.6/samples
sender_bcc_maps = hash:/etc/postfix/bcc
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_tls_cert_file = /etc/postfix/postfix.cert.pem
smtpd_tls_key_file = /etc/postfix/postfix.key.pem
smtpd_tls_mandatory_ciphers = high
smtpd_tls_security_level = may
unknown_local_recipient_reject_code = 550
virtual_alias_maps = hash:/etc/postfix/virtual

service iptables stop

telnet domain.com 143
Trying WANIP…
telnet: connect to address WANIP: Operation timed out
telnet: Unable to connect to remote host

telnet domain.com 993
Trying WANIP…
telnet: connect to address WANIP: Operation timed out
telnet: Unable to connect to remote host

traceroute localhost

traceroute to domain.com (WANIP), 64 hops max, 52 byte packets
 1  main (routerIP)  0.686 ms  0.323 ms  0.265 ms
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64  * * *

I port forwarded IMAPS 993 to localhost, telnet domain.com 993 now works.
Email client still has same error, so deleted email accounts, restarted email and added back again.
1 of 2 email accounts seems to register, but unable to send or receive emails.

12

So, tried all version of email client with Virtualmin/Usermin email.
IMAP port 993 SSL
IMAP port 143 SSL
IMAP port 993 no SSL
IMAP port 143 no SSL

Here’s some of the /var/log/maillog data:

Dec  3 12:54:06 localhost postfix/smtpd[1336]: connect from CPE-WANIP.oxqn1.cha.ISP.com[WANIP]
Dec  3 12:54:08 localhost postfix/smtpd[1336]: warning: SASL authentication failure: Password verification failed
Dec  3 12:54:08 localhost postfix/smtpd[1336]: warning: CPE-WANIP.oxqn1.cha.ISP.com[WANIP]: SASL PLAIN authentication failed: authentication failure
Dec  3 12:54:10 localhost postfix/smtpd[1336]: warning: SASL authentication failure: Password verification failed
Dec  3 12:54:10 localhost postfix/smtpd[1336]: warning: CPE-WANIP.oxqn1.cha.ISP.com[WANIP]: SASL PLAIN authentication failed: authentication failure
Dec  3 12:54:10 localhost postfix/smtpd[1336]: lost connection after AUTH from CPE-WANIP.oxqn1.cha.ISP[WANIP]
Dec  3 12:54:10 localhost postfix/smtpd[1336]: disconnect from CPE-WANIP.oxqn1.cha.ISP.com[WANIP]
Dec  3 12:57:30 localhost postfix/anvil[987]: statistics: max connection rate 3/60s for (smtp:WANIP) at Dec  3 12:51:23
Dec  3 12:57:30 localhost postfix/anvil[987]: statistics: max connection count 1 for (smtp:WANIP) at Dec  3 12:50:23
Dec  3 12:57:30 localhost postfix/anvil[987]: statistics: max cache size 1 at Dec  3 12:50:23
Dec  3 12:59:39 localhost postfix/pickup[32319]: 1109A7687: uid=502 from=<domain>
Dec  3 12:59:39 localhost postfix/cleanup[1796]: 1109A7687: message-id=<076c5e5a3757602fcb4e34d763c6181e@localhost>
Dec  3 12:59:39 localhost postfix/qmgr[1920]: 1109A7687: from=<domain@centos.com>, size=1396, nrcpt=1 (queue active)
Dec  3 12:59:40 localhost postfix/smtp[1799]: 1109A7687: to=<kuiperrj@hotmail.com>, relay=mx3.hotmail.com[65.54.188.72]:25, delay=1.5, delays=0.27/0.07/0.99/0.18, dsn=5.0.0, status=bounced (host mx3.hotmail.com[65.54.188.72] said: 550 OU-002 (BAY0-MC1-F47) Unfortunately, messages from WANIP 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))
Dec  3 12:59:40 localhost postfix/smtp[1799]: 1109A7687: lost connection with mx3.hotmail.com[65.54.188.72] while sending RCPT TO
Dec  3 12:59:40 localhost postfix/cleanup[1796]: 7725F7DEA: message-id=<20131203025940.7725F7DEA@centos.com>
Dec  3 12:59:40 localhost postfix/qmgr[1920]: 7725F7DEA: from=<>, size=3758, nrcpt=1 (queue active)
Dec  3 12:59:40 localhost postfix/bounce[1801]: 1109A7687: sender non-delivery notification: 7725F7DEA
Dec  3 12:59:40 localhost postfix/qmgr[1920]: 1109A7687: removed
Dec  3 12:59:53 localhost postfix/pickup[32319]: 23E197F2D: uid=502 from=<domain>
Dec  3 12:59:53 localhost postfix/cleanup[1796]: 23E197F2D: message-id=<64731bf648870dd7c2ac869872519d00@localhost>
Dec  3 12:59:53 localhost postfix/qmgr[1920]: 23E197F2D: from=<domain@centos.com>, size=1402, nrcpt=1 (queue active)
Dec  3 12:59:54 localhost postfix/smtp[1799]: 23E197F2D: to=<araijovh@hotmail.com>, relay=mx1.hotmail.com[65.55.92.152]:25, delay=1.2, delays=0.15/0/0.69/0.4, dsn=5.0.0, status=bounced (host mx1.hotmail.com[65.55.92.152] said: 550 OU-002 (SNT0-MC2-F19) Unfortunately, messages from WANIP 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))
Dec  3 12:59:54 localhost postfix/smtp[1799]: 23E197F2D: lost connection with mx1.hotmail.com[65.55.92.152] while sending RCPT TO
Dec  3 12:59:54 localhost postfix/cleanup[1796]: 5E0218B91: message-id=<20131203025954.5E0218B91@centos.com>
Dec  3 12:59:54 localhost postfix/qmgr[1920]: 5E0218B91: from=<>, size=3764, nrcpt=1 (queue active)
Dec  3 12:59:54 localhost postfix/bounce[1801]: 23E197F2D: sender non-delivery notification: 5E0218B91
Dec  3 12:59:54 localhost postfix/qmgr[1920]: 23E197F2D: removed
Dec  3 13:00:44 localhost postfix/pickup[32319]: 26BD98BFE: uid=502 from=<domain>
Dec  3 13:00:44 localhost postfix/cleanup[1796]: 26BD98BFE: message-id=<77e542033f24e9503ba12eb322415a86@localhost>
Dec  3 13:00:44 localhost postfix/qmgr[1920]: 26BD98BFE: from=<domain@centos.com>, size=1395, nrcpt=1 (queue active)
Dec  3 13:00:45 localhost postfix/smtp[1799]: 26BD98BFE: to=<hriswellnick@hotmail.com>, relay=mx4.hotmail.com[65.55.37.88]:25, delay=1.6, delays=0.41/0.02/1/0.2, dsn=5.0.0, status=bounced (host mx4.hotmail.com[65.55.37.88] said: 550 OU-002 (COL0-MC2-F47) Unfortunately, messages from WANIP 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))
Dec  3 13:00:45 localhost postfix/smtp[1799]: 26BD98BFE: lost connection with mx4.hotmail.com[65.55.37.88] while sending RCPT TO
Dec  3 13:00:45 localhost postfix/cleanup[1796]: BD3A38D2B: message-id=<20131203030045.BD3A38D2B@centos.com>
Dec  3 13:00:45 localhost postfix/qmgr[1920]: BD3A38D2B: from=<>, size=3764, nrcpt=1 (queue active)
Dec  3 13:00:45 localhost postfix/bounce[1801]: 26BD98BFE: sender non-delivery notification: BD3A38D2B
Dec  3 13:00:45 localhost postfix/qmgr[1920]: 26BD98BFE: removed
Dec  3 13:00:53 localhost postfix/local[1802]: 7725F7DEA: to=<domain@centos.com>, relay=local, delay=73, delays=0.01/0.04/0/73, dsn=2.0.0, status=sent (delivered to command: /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME)
Dec  3 13:00:53 localhost postfix/qmgr[1920]: 7725F7DEA: removed

No other options left on email client as needs to be IMAP.
Anyone know of a link on Virtualmin on how to setup the settings correctly so email works on Usermin and an email client?

13

Thanks.
What do you mean by residential? Do you mean DHCP rather than static, as I can fix that?
Not sure why centos.com is wrong as this is what Virtualmin setup and works in Usermin.
Forwarded ports 993 and 143 which help the email client remove some errors, but still not sending or receiving email.

Here’s the latest /var/log/maillog

Dec  5 17:17:00 localhost postfix/qmgr[2822]: 60247134B7: from=<domain@centos.com>, size=1776, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: 6E7A7F78C: from=<domain@centos.com>, size=2150, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: 67080134A3: from=<domain@centos.com>, size=2171, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: 14EE4827A: from=<domain@centos.com>, size=1800, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: 120611348F: from=<domain@centos.com>, size=2177, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: 10CE3134B2: from=<domain@centos.com>, size=2157, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: 9B4DF134A5: from=<domain@centos.com>, size=1794, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: EEB23CE42: from=<domain@centos.com>, size=1763, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: ECD67133B0: from=<domain@centos.com>, size=2167, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: E9A04134AF: from=<domain@centos.com>, size=2178, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: 8F64810333: from=<domain@centos.com>, size=2036, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: 8118D134A4: from=<domain@centos.com>, size=2147, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: 49110CF9F: from=<domain@centos.com>, size=2180, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: 48FA3134A1: from=<domain@centos.com>, size=2106, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: B66FB134A8: from=<domain@centos.com>, size=2168, nrcpt=1 (queue active)
Dec  5 17:17:00 localhost postfix/qmgr[2822]: B340310334: from=<domain@centos.com>, size=2176, nrcpt=1 (queue active)
Dec  5 17:17:01 localhost postfix/error[19640]: CF918134AA: to=<haltonksvv@hotmail.com>, relay=none, delay=1511, delays=1511/0.1/0/0.08, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19641]: CE68112726: to=<justicebau@hotmail.com>, relay=none, delay=1512, delays=1512/0.12/0/0.02, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19640]: 2FAA41349E: to=<haltonksvv@hotmail.com>, relay=none, delay=1512, delays=1512/0.14/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19641]: 2B699134B3: to=<belowdujl@hotmail.com>, relay=none, delay=1511, delays=1511/0.14/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19640]: 60247134B7: to=<wealnfkj@hotmail.com>, relay=none, delay=1511, delays=1511/0.14/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19641]: 6E7A7F78C: to=<wealnfkj@hotmail.com>, relay=none, delay=1513, delays=1512/0.15/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19640]: 67080134A3: to=<cannanjanfn@hotmail.com>, relay=none, delay=1512, delays=1511/0.16/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19641]: 14EE4827A: to=<apoilkospa@hotmail.com>, relay=none, delay=1513, delays=1513/0.16/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19640]: 120611348F: to=<nanaswndf@hotmail.com>, relay=none, delay=1512, delays=1512/0.17/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19641]: 10CE3134B2: to=<nanaswndf@hotmail.com>, relay=none, delay=1511, delays=1511/0.17/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19640]: 9B4DF134A5: to=<spelmanybs@hotmail.com>, relay=none, delay=1511, delays=1511/0.18/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19641]: EEB23CE42: to=<bemanptko@hotmail.com>, relay=none, delay=1513, delays=1513/0.19/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19640]: ECD67133B0: to=<deweydnjfc@hotmail.com>, relay=none, delay=1512, delays=1512/0.19/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19641]: E9A04134AF: to=<belowdujl@hotmail.com>, relay=none, delay=1511, delays=1511/0.19/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19640]: 8F64810333: to=<boardsjkw@hotmail.com>, relay=none, delay=1513, delays=1512/0.2/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19641]: 8118D134A4: to=<shirtszvdrz@hotmail.com>, relay=none, delay=1512, delays=1511/0.2/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19640]: 49110CF9F: to=<egbertaeu@hotmail.com>, relay=none, delay=1513, delays=1513/0.21/0/0.01, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19641]: 48FA3134A1: to=<deweydnjfc@hotmail.com>, relay=none, delay=1512, delays=1512/0.21/0/0.02, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19640]: B66FB134A8: to=<goldberguek@hotmail.com>, relay=none, delay=1511, delays=1511/0.22/0/0.02, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
Dec  5 17:17:01 localhost postfix/error[19641]: B340310334: to=<nanaswndf@hotmail.com>, relay=none, delay=1512, delays=1512/0.22/0/0.02, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again)
14

With “residential” he meant using your home DSL to operate a server. Like I myself noted multiple times, a lot of issues you’re seeing is stemming from that. So here’s once more and a final time my suggestion to NOT use your home connection for a server! If you insist on doing that, I wish, you good luck, because I can’t really help any further.

15

I see a number of DNS lookup failures in your logs.

You may want to verify that the DNS server listed in /etc/resolv.conf is correct, and that the BIND service is running.

Also, I see you have a firewall setup on your server.

With all the problems you seem to be having, I’d suggest keeping that turned off, until you’ve gotten everything working.

-Eric

16

Okay, so I have setup a dynamic dns which is running. Researching Virtualmin forum for how to configure Virtualmin with the dyndns.

17

Is anyone able to help with setting up Virtualmin now with the dyndns I have setup?
Research says this should fix the email issue and future Virtualmin use.

18

Having a dyndns hostname will not help you when your IP is blacklisted due to being a dialup. Also, operating nameservers on a dynamic DHCP-assigned home IP is a no-go. You’ll run into a lot of trouble with your setup.

19

Thank you for the replies.
Well, my ISP is setting my IP as a business account.
Internet connection is not a dialup connection.
Look forward to some positive feedback and help how to get the email going on Virtualmin, as I now have my regular email not getting through ports 143 and 993.

Still working on finalising the ddns setup which seems to be needed according to research.
Any help welcome.

20

Okay, so testing Virtualmin/Usermin works internally between email@domain1.com to email@domain2.com and email@domain3.com.
email@domain3.com receives external email okay on Virtualmin/Usermin.

Mac and iPhone give similar errors of:
The IMAP server “mail.domain3.com” is not
responding. Check your network
connection and that you entered the
correct information in the “Incoming
Mail Server” field.

Mac and iPhone have similar settings:
Advanced
Incoming Settings
Use SSL: ON
Authentication: Password
IMAP Path Prefix: INBOX
Server Port: 993