On Fri, Jul 07, 2023 at 11:54:44AM -0400, Viktor Dukhovni via Postfix-users
wrote:
> If the client uses PIPELINING, the pipelined "RCPT TO" after the rejected
> "MAIL FROM" will presumably be logged.
Turns out that's not the case. Postfix does not log client "syntax"
errors and sending "RCPT TO" once "MAIL FROM" is rejected "RCPT TO"
is a "50x" syntax error:
MAIL FROM:<...> SIZE=1234567890
552 5.3.4 Message size exceeds fixed limit
RCPT TO:<...>
503 5.5.1 Error: need MAIL command
Logs:
Jul 7 12:00:36 amnesiac postfix/smtpd[5728]:
connect from localhost[127.0.0.1]
Jul 7 12:00:58 amnesiac postfix/smtpd[5728]:
NOQUEUE: reject: MAIL from localhost[127.0.0.1]:
552 5.3.4 Message size exceeds fixed limit; ...
Jul 7 12:01:13 amnesiac postfix/smtpd[5728]:
disconnect from localhost[127.0.0.1]
ehlo=1 mail=0/1 rcpt=0/1 quit=1 commands=2/4
--
Viktor.
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