On Wed, 06 Aug 2003 19:11:30 +1000, Martin wrote: > $author = "Dave Kempe" ; >> >> does the config option initial_destiniation_concurrency solve this? its >> a bit unclear from the docs. is delivery concurrency what I am trying >> to acheive? > > not quite what you spelt out. destination concurrency controls how many > parallel deliverys are attempted to the same host using seperate > processes. it uses a method similar to TCP slow start where it gradually > increases the number of parallel deliveries until congestion is > encountered (or the max destination_concurrency_limit is reached). > > what you were describing is similar to HTTP persistent connections where > the MTA doesn't close the TCP connection after sending the first email > and uses it to send the second and subsequent emails. i'm not sure SMTP > supports that. RFC anyone?
RFC2821 and, yes, SMTP specifically includes support for pipelining. Quite possibly the problem could be because Postfix is using VERP (Variable Envelope Return Path) which requires a messages transaction per recipient. Anand -- SLUG - Sydney Linux User's Group - http://slug.org.au/ More Info: http://lists.slug.org.au/listinfo/slug
