I am seeing a lot of Temporary lookup failure errors in the maillog. At first I thought it was an issue related to reverse DNS lookups as each of the sending servers had no reverse record in DNS (this is an internal only relay). But when I added verbose logging, it appears to be related to LDAP lookups.
Most commonly, I get these errors: warning: dict_ldap_connect: Unable to bind to server ldap:.... But also receive these: maps_find: relay_recipient_maps: u...@mydomain.com: search aborted I can't find an exact solution for this in my searches. I realize that a 400 level error would be re-tried but the issue is a lot of internal apps here are not "SMTP-compliant". Is there a timeout I can adjust or a way to cache previous searches? The only workaround I can offer the application owners is to route their mail to localhost and use the localhosts SmartHost setting to route it to the preferred relay. This way localhost can handle the retries since the application quits on anything other than a 200-level error. Thanks, Rich Rich Gomes | Aramark | Senior Systems Administrator | Messaging and Collaboration Services 141 Longwater Drive Norwell, MA 02061 P: 1 (781) 763-4508
