Does anyone know what would cause Exim to reject recipient addresses in incoming email with a temporary rejection when there is no 'verify = recipient' ACL in use ?
Recently, some of our Exim systems started rejecting all email to external recipients. The problem started without any obvious cause, and stopped after about an hour. The problem affected all our internal Exim systems (7 machines), and the problem stopped on all machines within a few seconds, suggesting that it was caused by some external event, such as a DNS problem, except that there was no evidence of DNS problems or any other network problems. Email sent to internal domains was not affected. We have 'verify = recipient' for internal domains but not for external domains. The logs did not give any indication of the cause. The entries had the form: 2007-06-25 14:20:03 H=mac22.ucl.ac.uk [128.40.2.152] F=<[EMAIL PROTECTED]> temporarily rejected RCPT <[EMAIL PROTECTED]> Normally there is some additional explanation at the end of the log entry, but not in this case. The machines that were affected all had identical configurations, are running a mixture of Solaris 8 and Solaris 10, are on several different subnets, and are using Exim 4.63. We have some other machines that have 'verify = recipient' for all recipients, and these were not affected. This is the second time that the problem has occurred in 6 months, but on both occasions, it went away before we could investigate it fully. There have been no recent changes to our Exim configuration, and we have running Exim for a number of years without seeing this problem. Has anyone else seen a similar problem ? -- Adrian Barker, Information Systems University College London, Gower Street, London WC1E 6BT External phone: +44 20 7679 5140, Fax (+44) 20 7388 5406 Internal phone: x 25140 Email: [EMAIL PROTECTED] -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
