On Fri, 22 Sep 2006, W B Hacker wrote:
> A correspondent MTA will not know prior to starting delivery runs that
> <domain1>.<tld> and <domain2>.<tld> are hosted on the same virtual server IP, so
> will run separate deliveries for the 'To:', 'CC:', Bcc:' not on the same domains.
Not true for Exim provided that both the virtual servers are using the
same IP address (as you have stated that they are). Independent of the
domains, Exim sorts outgoing addresses according to the host lists they
route to, and uses a single connection for those that are going to the
same hosts (up to the max_rcpt limit, and subject to having the same
added headers, rewritten return-path, etc, etc. that is, when the
message bodies are identical).
--
Philip Hazel University of Cambridge Computing Service
Get the Exim 4 book: http://www.uit.co.uk/exim-book
