Viktor Dukhovni via Postfix-users:
> On Tue, Feb 25, 2025 at 05:01:01PM +1100, duluxoz via Postfix-users wrote:
>
> > Oh, and the HAProxy health check? The relevant lines in the HAProxy config
> > file are/were:
> >
> > ??? backend submission_server
> >
> > ?? ???? option smtpchk
> >
> > ??? ??? server mail mail.local:25587 check send-proxy-v2
>
> Perhaps it sends a negative port number as a sentinel value?
> Which would be an unfortunate choice, if that's the default.
That is unlikely.
In the V1 protocol, port is a space-delimited aubstring, validated by
valid_hostport().
In the v2 protocol, port is an unsigned 16-bit type.
Wietse
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