[Mailman-Users] Strange Wiki entry for Postfix Tuning

[Ralf Hildebrandt]

* Stefan Förster <cite+mailman-users at incertum.net>:
> Hello,
> 
> 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
MXes?

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de