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Grant Sewell wrote: > On Mon, 11 May 2009 19:33:39 +0100 > > The current setup doesn't include Mailman. The mail in question is > generated by PHP and the contents are passed to the Linux "mail" > command. We are trying to make the process as streamlined as possible, > hence the inclusion of some software that's been written specifically > for mass-mailing. Yes, but you want to understand the bottleneck is, since otherwise you'll just hit it with more force. My guess is queue performance. Linux "mail" command ? The PHP mail function, or the BSD util? I'm guessing if the later than using the MTA sendmail interface will be substantially more efficient (/usr/lib/sendmail) or just talking to the MTA on port 25 (which I believe PHP offers as an option). Don't ask me about VERP - you want it - but it is always slightly harder to get right that you think it could possibly be. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html