sudo tail /var/log/maillog
Oct 3 06:39:28 instance-23 postfix/master[63679]: warning: process /usr/libexec/postfix/trivial-rewrite pid 64274 exit status 1
Oct 3 06:39:28 instance-23 postfix/master[63679]: warning: /usr/libexec/postfix/trivial-rewrite: bad command startup -- throttling
Oct 3 06:39:54 instance-23 postfix/qmgr[63681]: warning: problem talking to service rewrite: Connection timed out
Oct 3 06:40:25 instance-23 postfix/postscreen[64336]: fatal: myhostname and relayhost parameter settings must not be identical: mail.duchi.net
Oct 3 06:40:26 instance-23 postfix/master[63679]: warning: process /usr/libexec/postfix/postscreen pid 64336 exit status 1
Oct 3 06:40:26 instance-23 postfix/master[63679]: warning: /usr/libexec/postfix/postscreen: bad command startup -- throttling
Oct 3 06:40:28 instance-23 postfix/trivial-rewrite[64337]: fatal: myhostname and relayhost parameter settings must not be identical: mail.duchi.net
Oct 3 06:40:29 instance-23 postfix/master[63679]: warning: process /usr/libexec/postfix/trivial-rewrite pid 64337 exit status 1
Oct 3 06:40:29 instance-23 postfix/master[63679]: warning: /usr/libexec/postfix/trivial-rewrite: bad command startup -- throttling
Oct 3 06:40:55 instance-23 postfix/qmgr[63681]: warning: problem talking to service rewrite: Connection timed out
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Gerald Schneider
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tiffin lily
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1Well, you can fix the obvious errors about your config (`myhostname and relayhost parameter settings must not be identical`), but a timeout usually points toward a firewall issue. Most probably your hoster is blocking outgoing SMTP connections, a common practice. Talk to your hoster. – Gerald Schneider Oct 03 '20 at 08:10
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we work on port 465 – tiffin lily Oct 03 '20 at 08:25
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You have no influence on that. If the target server only accepts connections on port 25 you have to use it. – Gerald Schneider Oct 03 '20 at 08:42
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it's google cloud and blocked 25, we try on port 587 – tiffin lily Oct 03 '20 at 15:29
1 Answers
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Firewall configuration required for a mail server or mail transfer agent (mta) should be as follows;
- 25, 465, 587 for SMTP
- 110, 995 for POP
- 143, 993 for IMAP
- 53 for DNS,
You can check the above ports with a port control web page you can find from the Internet.
Also, if you can specify the operating system, I can help you define a firewall.
menderes
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