On 2010-07-08 12:11, William Blunn wrote:
Exim also has excellent caching for recipient address verification.
Off topic for Dovecot, but probably relevant for this thread: Not as
excellent as you might think. Exim will typically do at least 2
"userdb"-type lookups for each recipient of a message. One when
verifying the recipient and another when delivering the message. The
reason for this is that the delivery in done in a separate process.
Not that Exim isn't an excellent product; I couldn't imaging living
without it :-)
Bob
