On Wed, 15 Aug 2007, Fred Moyer wrote:
Maybe take Apache::Qpsmtpd for a spin. Anecdotal evidence suggests that it is faster than forkserver [1], and it is a fairly simple install. Apache.org is using it and processes quite a bit of mail.[1] http://osdir.com/ml/mail.qpsmtpd/2006-04/msg00035.html
AFAICT, nobody has ever said what constitutes 'faster', or what performance testing has been done forkserver v Apache::Qpsmtpd.