[Mailman-Users] Strange Wiki entry for Postfix Tuning
Ralf.Hildebrandt at charite.de
Tue Aug 4 12:51:29 CEST 2009
* Stefan Förster <cite+mailman-users at incertum.net>:
> I've discovered that the FAQ at http://wiki.list.org/x/rIA9
> mentions to set smtp_mx_session_limit=100. While normally, I would
> reject such a suggestion as outright wrong, I noticed that this were
> comments made by Barry Knowles, and you don't just ignore hints from
> someone with that much experience in mailing lists.
Bary Warsaw or Brad Knowles. According to my knowledge they haven't
married. I might be wrong though.
It's brad in our case :)
> So, what is the reason for that setting? From man 5 postconf:
> ,----[ man 5 postconf | less +/^smtp_mx_session_limit ]
> | smtp_mx_session_limit (default: 2)
> | The maximal number of SMTP sessions per delivery request before
> | giving up or delivering to a fall-back relay host, or zero (no
> | limit). This restriction ignores sessions that fail to complete
> | the SMTP initial handshake (Postfix version 2.2 and earlier) or
> | that fail to complete the EHLO and TLS handshake (Postfix version
> | 2.3 and later).
> | This feature is available in Postfix 2.1 and later.
> While I can certainly imagine larger sites having somewhere between
> five to ten MXs, 100 seems a bit... oversized.
maybe it tries to set a very hight threshold, thus ALWAYS using ALL
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