Andr? Rodier via Postfix-users:
> However, is there an option, in Postfix, to keep the TCP connection
> opened for submission(s) protocols (ports 465 or 587)
For RECEIVING mail, specify a long smtpd_timeout value, like 1000s
master.cf:
submission .. .. .. .. .. .. .. smtpd
....other overrides...
-o smtpd_timeout=1000
submissions .. .. .. .. .. .. .. smtpd
....other overrides...
-o smtpd_timeout=1000
This makes the MTA more vulnerable to Denial of service.
If you want to keep connections idle for SENDING mail, that is
possible too, but that takes a bit more configuration.
Wietse
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