Issue Email sent from the other party is not dropped

[xemorytr]

Server operating system version

Ubuntu 22.04.1 LTS

Plesk version and microupdate number

Version 18.0.50 Update #2

hello everyone,
An e-mail is sent to us from the other side, but the e-mail does not go to the inbox. in no way.
I found this in the logs.
what are we supposed to do here?
Thank you.

postfix/smtpd [53845]
disconnect from unknown[ip] ehlo=1 starttls=0/1 commands=1/2
2023-02-17 20:14:14 INFO
postfix/smtpd [53845]
lost connection after STARTTLS from unknown[ip]
2023-02-17 20:14:14 WARNING
postfix/smtpd [53845]
warning: TLS library problem: error:0A000102:SSL routines::unsupported protocol:../ssl/statem/statem_srvr.c:1234:
2023-02-17 20:14:14 INFO
postfix/smtpd [53845]
SSL_accept error from unknown[ip]: -1
2023-02-17 20:14:14 INFO
postfix/smtpd [53845]
connect from unknown[ip]
2023-02-17 20:14:14 WARNING
postfix/smtpd [53845]
warning: hostname x.com does not resolve to address ip


It seems like the other party's server is not inboxed because it is insecure.
What is the way to open it?

 

[scsa20]

I am not quiet understanding the question (and it might be a language barrier) but I'm guessing someone is sending you an email but the email is not in the inbox? Did you check the mail queue under Tools & Settings > Mail Queue?

There's just so many possibilities that they didn't sent you any thing at all (aka misspelled the domain).

Your best bet would be to take a look through /var/log/maillog and see what it shows, see if it came through or not. Like searching by the domain or email address of the sender and see if it even shows in the log.

 

[xemorytr]

yes that's true.
The other party sends e-mails, but it does not reach us.
queue is empty.
The mail log just looks like the one above.
There are no other logs.

 

[scsa20]

Did you tried searching by their domain?

cat /var/log/maillog | grep sendersDomain.tld