Gerben Wierda via Postfix-users:
> > On 31 May 2024, at 14:53, Wietse Venema <[email protected]> wrote:
> >
> > Gerben Wierda via Postfix-users:
> >>
> >>> On 31 May 2024, at 13:20, [email protected] wrote:
> >>>
> >>> Hello,
> >>>
> >>> Any sign of postfix 3.9 blacklisting HAproxy because of SMTP
> >>> errors/abuse/half-baked connections?
> >>
> >> Not blacklisting as I understand it, but as HAproxy makes a connection to
> >> test if the service is up and then breaks the connection I always see this
> >> on both systems:
> >>
> >> On the postfix 3.9 instance
> >> May 26 05:31:33 hermione submission_haproxy/smtpd[21485]: connect from
> >> router.rna.nl[192.168.2.2]
> >> May 26 05:31:33 hermione submission_haproxy/smtpd[21485]: improper command
> >> pipelining after CONNECT from router.rna.nl[192.168.2.2]: QUIT\r\n
> >> May 26 05:31:33 hermione submission_haproxy/smtpd[21485]: disconnect from
> >> router.rna.nl[192.168.2.2] commands=0/0
> >
> > Yep, turn off smtpd_forbid_unauth_pipelining and try again..
> >
> > Wietse
>
> Actually, changing the health check on submission to
>
> "PROXY TCP4 192.168.2.2 192.168.2.2 65535 587\r\n"
>
> (without the added "QUIT\r\n") did the trick as well. It might
> have been that in a previous situation HAproxy would 'never' finish
> the health check, I don't recall why I added "QUIT\r\n". Maybe it
> is needed for postscreen or dovecot and I just copied it to all
> and now it stopped working for submission.
Does not work?
- Logging would be extremely helpful.
- A machine-readable before-after configration diff would also be extremely
helpful.
Wietse
Wietse
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