[Mimedefang] Sendmail SOCKETMAP

Andrzej A. Filip andrzej.filip at gmail.com
Wed Apr 27 14:54:43 EDT 2016

Dianne Skoll <dfs at roaringpenguin.com> wrote:
> On Wed, 27 Apr 2016 18:41:57 +0100
> Dave Osbourne <dave at osbourne.uk.eu.org> wrote:
> [Dianne]
>> > 2) Does anyone use the "-N map_sock" feature that provides a
>> > SOCKETMAP to Sendmail 8.13+?  If not... again, I'd like to nuke.
> [Dave]
>> I don't really know what this is...  have a exposed my ignorance? We
>> do use sendmail though... is there somewhere I can read about this to
>> know whether there will be an issue when we next update?
> Sendmail has various map types, the best known of which is the Berkeley DB
> map that typically implements access, mailertable, etc.
> Sendmail 8.13+ has provisions for a network protocol to do map lookups
> over sockets instead of doing Berkeley DB lookups.  In theory, this
> lets you do cool things, but we found in practice the performance hit
> was very high.
> If you don't know what SOCKETMAP is, you're almost certainly not
> using it. :)

If your ambition is hardly limited then you may donate sendmail.org
"socketmap alike over UDP". It could be simple assuming design for
unix sockets.

A. Filip

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