On Fri, 2003-11-14 at 13:40, J C Lawrence wrote:
On Fri, 14 Nov 2003 09:05:48 +0100 Martin Maechler <maechler@stat.math.ethz.ch> wrote:
- VERP will probably cost quite a bit of CPU/memory/disk-IO resources on the mail servert. Currently that server almost constantly runs on load 2.5 -- 3 (because of anti-virus / anti-spam / mailman ..)
The added overhead is increased delivery expense in the form of more disk IO, both for the initial delivery from Mailman, and the final delivery to the target MX. The other overheads are fairly minimal given minor MTA tuning.
Virus/Spam scanning should not be done for mail injection from mailman - its already been scanned when it came through the MTA on the way into mailman, so a second scan is completely superfluous and downright silly when you have expanded the original incoming message into a number of outgoing ones (even without VERP).
Nigel.-- [ Nigel Metheringham Nigel.Metheringham@InTechnology.co.uk ] [ - Comments in this message are my own and not ITO opinion/policy - ]