How to send mail via external SMTP from local ClearOS server mailboxes?

Question

Mail server

I tried to set up work via external smtp according to this article:

https://serveradmin.ru/otpravka-pochtyi-cherez-kon...

When sending a test message, I get the following logs:

Apr  9 11:49:28 gateway postfix/pickup[2986]: 7683820809: uid=0 from=<root>
Apr  9 11:49:28 gateway postfix/cleanup[23752]: 7683820809: message-id=<[email protected]>
Apr  9 11:49:28 gateway postfix/qmgr[2987]: 7683820809: from=<[email protected]>, size=654, nrcpt=1 (queue active)
Apr  9 11:49:28 gateway postfix/smtpd[23756]: connect from localhost[127.0.0.1]
Apr  9 11:49:28 gateway postfix/smtpd[23756]: D5431207FB: client=localhost[127.0.0.1]
Apr  9 11:49:28 gateway postfix/cleanup[23752]: D5431207FB: message-id=<[email protected]>
Apr  9 11:49:28 gateway postfix/qmgr[2987]: D5431207FB: from=<[email protected]>, size=826, nrcpt=1 (queue active)
Apr  9 11:49:28 gateway postfix/smtpd[23756]: disconnect from localhost[127.0.0.1]
Apr  9 11:49:28 gateway postfix/pipe[23754]: 7683820809: to=<[email protected]>, relay=mailprefilter, delay=0.55, delays=0.17/0.03/0/0.35, dsn=2.0.0, status=sent (delivered via mailprefilter service)
Apr  9 11:49:28 gateway postfix/qmgr[2987]: 7683820809: removed

Test message to [email protected] does not arrive.

What could be the problem: Is the internal server filter on ClearOS silencing outgoing messages?

The most interesting thing is that I set up the collection of mail (pop3) from an external mail.ru account via mail retrieval without any problems at all.

Answer 1

And so, based on the following:

The Postfix SMTP client does not support the obsolete «wrappermode» protocol, which uses TCP port 465 on the SMTP server!

it is necessary to open a tunnel using stunnel and send letters to mail.ru through this tunnel

cat /etc/stunnel/mailru-smtp.conf
[smtp-tls-wrapper]
accept = 127.0.0.1:10465
client = yes
connect = smtp.mail.ru:465

# stunnel /etc/stunnel/mailru-smtp.conf
# telnet 127.0.0.1 10465

# postmap /etc/postfix/sasl_passwd
# service postfix restart

And everything works. EH! Happy cosmonautics day

Answer 2

Well, what about the configs?