On 2/19/2014 2:13 AM, Fredrik Sandström wrote: > Hi, > > A strange problem has surfaced in my mail system, running postfix 2.6.6 > on Red Hat EL 6. When an alias file has been updated, and postalias run, > the system will incorrectly reject SOME (not all) mail with "User > unknown" for a short while (a minute or so). > > This only happens occasionally, and seemingly only if the alias update > happens under fairly heavy load, while accepting many hundreds > connections per minute. (On avarage, we deliver around 50 messages per > minute.) > > The new alias file is written first to a temporary location, then moved > into place, and then postalias is run.
This is backwards... run postalias on the temporary file, then move the fresh .db into place. Please see http://www.postfix.org/DATABASE_README.html#safe_db -- Noel Jones
