Mails are not sent from my website

Virtualmin
1

it has bee a week since I didn’t get any emails from my opencart website (from contact us or new orders and new customers registration).
I noticed after an customer sent me an email directly to me asking when I was going to reply.
I would be really glad if you could let me know what could be the problem as on Opecart error log there aren’t any issues.

Thanks,
Roberto

🛈 SYSTEM INFORMATION
OS type and version CentOS Linux 7.8.2003
Webmin version 1.973
Virtualmin version 6.16 Pro
Related packages SUGGESTED
2

What about the mail log? Have you looked there?

3

Thanks for your reply. Honestly I didn’t know where to look and also I am not sure if I am looking at the right log at Webmin / System → System Log → var/log/maillog? Sorry, I had to remove the .com extension in the log as the admin would not let me post the message with more than 2 links:

Feb  1 05:30:07 host postfix/cleanup[50976]: 01946BA28F: message-id=<20220201053007.01946BA28F@host.------->
Feb  1 05:30:07 host postfix/qmgr[1656]: 01946BA28F: from=<onlydent@host------>, size=806, nrcpt=1 (queue active)
Feb  1 05:30:30 host postfix/local[50980]: 01946BA28F: to=<deals--------@host.------->, orig_to=<deals@------>, relay=local, delay=24, delays=0.02/0.01/0/24, dsn=2.0.0, status=sent (delivered to command: /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME)
Feb  1 05:30:30 host postfix/cleanup[50976]: 0743DBA293: message-id=<20220201053007.01946BA28F@host.------->
Feb  1 05:30:30 host postfix/qmgr[1656]: 0743DBA293: from=<onlydent@host.------->, size=965, nrcpt=1 (queue active)
Feb  1 05:30:30 host postfix/local[50980]: 01946BA28F: to=<deals--------@host.------->, orig_to=<deals@------->, relay=local, delay=24, delays=0.02/0.01/0/24, dsn=2.0.0, status=sent (forwarded as 0743DBA293)
Feb  1 05:30:30 host postfix/qmgr[1656]: 01946BA28F: removed
Feb  1 05:30:30 host postfix/smtp[51177]: connect to gmail-smtp-in.l.google.c--[2a00:1450:400c:c0c::1b]:25: No route to host
Feb  1 05:30:31 host postfix/smtp[51177]: 0743DBA293: to=<rockmiranda-gmail>, orig_to=<deals@-------->, relay=gmail-smtp-in.l.google.--[108.177.15.26]:25, delay=24, delays=24/0.01/0.18/0.29, dsn=5.7.26, status=bounced (host gmail-smtp-in.l.google.---108.177.15.26] said: 550-5.7.26 This message does not have authentication information or fails to 550-5.7.26 pass authentication checks. To best protect our users from spam, the 550-5.7.26 message has been blocked. Please visit 550-5.7.26  https://support.google.--/mail/answer/81126#authentication for more 550 5.7.26 information. bg18si1022840wmb.144 - gsmtp (in reply to end of DATA command))
Feb  1 05:30:31 host postfix/cleanup[50976]: 62496BA28F: message-id=<20220201053031.62496BA28F@host.------->
Feb  1 05:30:31 host postfix/qmgr[1656]: 62496BA28F: from=<>, size=3753, nrcpt=1 (queue active)
Feb  1 05:30:31 host postfix/cleanup[50976]: 63228BA295: message-id=<20220201053031.62496BA28F@host.------->
Feb  1 05:30:31 host postfix/bounce[51178]: 0743DBA293: sender non-delivery notification: 62496BA28F
Feb  1 05:30:31 host postfix/qmgr[1656]: 0743DBA293: removed
Feb  1 05:30:31 host postfix/local[50980]: 62496BA28F: to=<onlydent@host.------->, relay=local, delay=0.01, delays=0/0/0/0, dsn=2.0.0, status=sent (forwarded as 63228BA295)
Feb  1 05:30:31 host postfix/qmgr[1656]: 62496BA28F: removed
Feb  1 05:30:31 host postfix/qmgr[1656]: 63228BA295: from=<>, size=3900, nrcpt=1 (queue active)
Feb  1 05:30:31 host postfix/smtp[51177]: connect to gmail-smtp-in.l.-----[2a00:1450:400c:c0c::1b]:25: No route to host
Feb  1 05:30:31 host postfix/smtp[51177]: 63228BA295: to=<rockmiranda@------>, orig_to=<onlydent@host.-------->, relay=gmail-smtp-in.l.-----[108.177.15.26]:25, delay=0.31, delays=0/0/0.14/0.17, dsn=5.7.26, status=bounced (host gmail-smtp-in.l.-----108.177.15.26] said: 550-5.7.26 This message does not have authentication information or fails to 550-5.7.26 pass authentication checks. To best protect our users from spam, the 550-5.7.26 message has been blocked. Please visit 550-5.7.26  https://support.----/mail/answer/81126#authentication for more 550 5.7.26 information. w18si928939wmk.134 - gsmtp (in reply to end of DATA command))
Feb  1 05:30:31 host postfix/qmgr[1656]: 63228BA295: removed

Thanks.

4

After a few minutes I got other logged errors… a little different I guess:

Feb  1 05:53:34 host postfix/anvil[52638]: statistics: max connection rate 4/60s for (smtp:5.34.205.29) at Feb  1 05:48:46
Feb  1 05:53:34 host postfix/anvil[52638]: statistics: max connection count 1 for (smtp:85.202.169.215) at Feb  1 05:47:35
Feb  1 05:53:34 host postfix/anvil[52638]: statistics: max cache size 2 at Feb  1 05:47:58
Feb  1 05:56:42 host postfix/qmgr[1656]: DCC56BA290: from=<onlydent@host.------>, size=1125, nrcpt=1 (queue active)
Feb  1 05:56:42 host postfix/smtp[53505]: connect to mx3.34sp------[2a00:1ee0:2:8::2eb7:dfa]:25: No route to host
Feb  1 05:56:42 host postfix/smtp[53505]: connect to mx4.34sp------[2a00:1ee0:2:8::2eb7:dd0]:25: No route to host
Feb  1 05:56:42 host postfix/smtp[53505]: DCC56BA290: host mx4.34sp------[46.183.13.208] said: 450 4.1.8 <onlydent@host.------>: Sender address rejected: Domain not found (in reply to RCPT TO command)
Feb  1 05:56:42 host postfix/smtp[53505]: DCC56BA290: to=<info@------>, relay=mx3.34sp------[46.183.13.250]:25, delay=235516, delays=235516/0.02/0.24/0.04, dsn=4.1.8, status=deferred (host mx3.34sp------[46.183.13.250] said: 450 4.1.8 <onlydent@host.------>: Sender address rejected: Domain not found (in reply to RCPT TO command))
Feb  1 05:58:56 host postfix/smtpd[53561]: connect from unknown[37.49.225.111]
Feb  1 05:58:56 host postfix/smtpd[53561]: lost connection after CONNECT from unknown[37.49.225.111]
Feb  1 05:58:56 host postfix/smtpd[53561]: disconnect from unknown[37.49.225.111]
Feb  1 05:59:32 host postfix/smtpd[53561]: connect from unknown[5.34.205.29]
Feb  1 05:59:44 host postfix/smtpd[53561]: warning: unknown[5.34.205.29]: SASL LOGIN authentication failed: authentication failure
Feb  1 05:59:45 host postfix/smtpd[53561]: disconnect from unknown[5.34.205.29]
Feb  1 05:59:46 host postfix/smtpd[53561]: connect from unknown[5.34.205.29]
5

As for the gmail issues, it’s quite clear:

You are missing either PTR, DKIM, DMARC or SPF (or a combination of those).

As for the second one, it says “Sender address rejected” which, without knowing the domain, is difficult to guess what’s causing.

6

How would that possible as until around 10 days ago I was getting emails for customers registrations or orders and then nothing?
No changes have been made on the server for months …
I made the requested updates yesterday hoping that rebooting the server at the end of the updates would restore the mail service, but nothing have changed.
How do I check these and how do I proceed to resolve this issue?
Thanks again,
Roberto

7

First of all, read up on what Google says in this link.
Then check your domain on mxtoolbox.com to see if everything is “as it should” regarding DNS set up.
If you want, send me your domain in PM and I can take a quick look.

8

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