--On 2 November 2007 11:39:56 +0000 Graeme Fowler <[EMAIL PROTECTED]> wrote:
> On Fri, 2007-11-02 at 04:24 -0700, ikearns wrote: >> However any mail that does get through that is destined for a resolvable >> email address will then be delivered to the back end server(s) via and >> Exim box running manualroutes. Should this message be undeliverable >> (through the mailbox not existing) then this is sent back to the sender. >> I believe this is common practise and as describes, required as a NDR. > > OK, so you could therefore do: > > require verify = recipient/callout > domains = +local_domains It's already too late. His anti-spam platform has already accepted the message for delivery. > > or a variant thereof, in an appropriate place in your ACLs - perhaps in > the RCPT ACL, so it's done *before* spam and virus scans take place. > This way Exim will call forward to the backend servers and validate the > recipient address as part of the SMTP transaction, thus saving on AS/AV > resources since the RCPT call will be rejected before DATA if the > recipient mailbox is invalid. > > Your backend servers will then not generate any NDRs since invalid > recipients will never get to them. > > This depends, of course, on your backend servers being able to reject at > RCPT time rather than doing accept-and-bounce. > > Graeme -- Ian Eiloart IT Services, University of Sussex x3148 -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
