Thanks, Wietse. I'm going to outline how the 20,000 entries were lost and how I modified the address_verify_map file. This is to help anyone who encounters my issues in the future.
I ran postmap -s hash:/path/to/address_verify_map > address_verify_map.out I modified the address_verify_map.out file by removing the entries. In my case these were people with error 550 (unknown user). I ran postmap address_verify_map.out. If there were any duplicate entries (case-insensitive) within the file, this process removed them. I had to shutdown postfix, move the address_verify_map.out file to /path/to/address_verify_map and change permissions to postfix:postfix. Start postfix up. -----Original Message----- From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Wietse Venema Sent: Thursday, September 18, 2014 9:56 AM To: Postfix users Subject: Re: address_map_verify question Moore, Patrick: > All, > > I've recently implemented the address_verify_map to mitigate some > verification problems we were having with a cloud provider. I had to > remove one entry in this cache. After using postmap -s to export the > contents to file, remove the offending entry, and run postmap again to > recreate the file, I lost approximately 20,000 entries in the cache. Editing the cache is not supported. That would require sending messages to the verify daemon, and such code does not exist at this time. The verify daemon locks the file for exclusive access and bad things will happen when an open file is changed. > When running postmap to recreate the file, all of these "duplicates" > were removed. Is this normal behavior? Is postfix case-sensitive with > regards to recipient verification on inbound mail? RFC 5321 section 2.4 says: [SMTP command] Verbs and argument values [...] are not case sensitive, with the sole exception in this specification of a mailbox local-part [...] I did not write code to case-fold the domain portions. That would be an optimization to save some space. There is also some risk of false positives and false negatives; Postfix does know how downstream software handles case differences. You're welcome to contribute code to case-fold domain portions, but you must not use strchr(). Wietse
