Jeff Peng via Postfix-users:
> Hello
>
> what's this error in mail.log?
>
> Jun 11 01:52:15 tls-mail postfix/smtpd[67409]: connect from
> unknown[172.210.47.140]
> Jun 11 01:52:16 tls-mail postfix/smtpd[67409]: SSL_accept error from
> unknown[172.210.47.140]: -1
> Jun 11 01:52:16 tls-mail postfix/smtpd[67409]: warning: TLS library
> problem: error:1417A0C1:SSL routines:tls_post_process_client_hello:no <<<<<<
> shared cipher:../ssl/statem/statem_srvr.c:2283: <<<<<
> Jun 11 01:52:16 tls-mail postfix/smtpd[67409]: lost connection after
> STARTTLS from unknown[172.210.47.140]
> Jun 11 01:52:16 tls-mail postfix/smtpd[67409]: disconnect from
> unknown[172.210.47.140] ehlo=1 starttls=0/1 commands=1/2
>
> I have only port 465 opened for sending mail. port 587 is shutdown.
The lines with <<<< show the error message (no shared cipher).
If this does not happen with a legitimate client, then this could
be someone who is looking for trouble (they failed) and you can
ignore the problem.
If this does happen with a legitimate client, then the client or
server needs to adjust their TLS settings.
Wietse
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