On Fri, Mar 11, 2016 at 06:21:06PM +0100, Msd wrote: > >There was an MX lookup bugfix for Postfix 2.11 in May 2014. > > > > Wietse > > > >Bugfixes (fixed in Postfix 2.11 and Postfix 2.12): > > > > * With connection caching enabled (the default), recipients > > could be given to the wrong mail server. The root cause was an > > incorrect predicate. Due to this, the Postfix SMTP client could > > save and restore plaintext connections that should not be cached, > > under nonsensical lookup keys that did not distinguish by destination. > > Problem reported by Sahil Tandon.
Specifically, (ignoring snapshots) this was introduced in 2.11.0 and fixed in 2.11.1. The only affected stable release was 2.11.0. -- Viktor.