+ignore_unknown in your list?
Jethro. On Fri, 16 Aug 2013, Paul Walsh wrote: > > I've been bitten by this a number of times and wondered if anyone had > a) done the same, and b) come up with a solution.... > In the configuration file of our outbound mail gateway I have a host > list relay_hosts of all hosts allowed to relay mail. In the ACL for > acl_smtp_rcpt I have the following: > accept hosts = +relay_hosts > # > # If we've got this far it means the source and recipient are outside > our control > # and thus someone is trying to use us as a relay. > # > deny message = relay not permitted > This is all fine and dandy until the entry for one of the hosts in > relay_hosts is deleted from DNS. As Exim works its way through the > list to verify if a sending host is allowed to relay mail, it hits the > entry for the now defunct host, tries a forward DNS lookup to get an > IP address to compare with that of the sending host and, because the > lookup fails, immediately considers the sending host to not be in the > list thus causing delivery to fail with the "relay not permitted" > message. Unfortunately, any attempt to relay mail by a host in the > list after the defunct host also results in a "relay not permitted" > rejection. > I'm trying to determine if it's possible to have Exim parse the entire > list, only rejecting if the sending IP address didn't match any of > those returned by looking up each host, or at the very least flag up > some sort of warning that the host list contains addresses that can't > be resolved. > Thoughts? > -- > Paul Walsh > > Head of Unix/Linux Systems Services, > Corporate ICT, > Birmingham City University, > City North Campus, Perry Barr, > BIRMINGHAM B42 2SU, UK > Tel: +44 (0)121 331 5708 > Fax: +44 (0)121 356 2875 > Mobile: +44 (0)7974 150 421 > -- > ## List details at https://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/ > . . . . . . . . . . . . . . . . . . . . . . . . . Jethro R Binks, Network Manager, Information Services Directorate, University Of Strathclyde, Glasgow, UK The University of Strathclyde is a charitable body, registered in Scotland, number SC015263. -- ## List details at https://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/
