The other-connections variable reports how many TCP connections Archiveopteryx holds open that are neither internal nor connected to one of the protocols served (IMAP etc).
Most external TCP connections are related to IMAP (imap-connections), HTTP (http-connections), POP (pop-connections) or SMTP (smtp-connections). This variable counts only other connections to/from the outside world.
At the moment, only SMTP client connections to the smarthost are counted towards other-connections. However, other unimportant external connections are sure to be added in the future.
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Last modified: 2010-11-19