michaelof--- via Postfix-users:
> 2024-02-22T13:56:15.715392+01:00 vserver postfix/submission/smtpd[150038]:
> connect from <FAILED: sender-dns-name[IPv4]>
> 2024-02-22T13:56:15.715607+01:00 vserver postfix/submission/smtpd[150038]:
> improper command pipelining after CONNECT from <FAILED:
> sender-dns-name[IPv4]>: \026\003\001\001
> \001\000\001\034\003\003o\365\274\337\000\246\346\341\276\270\237\233\021p\314S\312\371\3149\231\202d\201?\241\332\357\214\330\313\301
>
> \255\357\251\234m\024\225\250Yx\344oa\207\342p\354\0261B\347\223m\224Q\td\276n:#\n\000>\023\002\023\003\023\001\300,\3000\000\237\314\251\314\250\314\252\300+\300/
> 2024-02-22T13:56:15.715853+01:00 vserver postfix/submission/smtpd[150038]:
> disconnect from <FAILED: sender-dns-name[IPv4]> commands=0/0
Configure the client to onnect to port 465 instead of 578.
With Postfix, uncomment the smtps(submissions) service in the Postfix
master.cf file. It should have the same "-o" options lines as the
submission service, plus a line that says "-o smtpd_tls_wrappermode=yes".
Then execute the command "postfix reload".
You may need to open port 465 with a firewall rule.
Wietse
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