On Mon, Mar 07, 2011 at 11:55:34AM -0600, Stan Hoeppner wrote: > > Unfortunately, the newer postfix rate delay controls are still based on > > the recipient domain, not the MX destination. > > Yeah. He can absolutely fix his current problem with it. But if he has > to configure huge delays to accomplish it, this obviously creates yet > more problems: a backed up queue and mail not delivered in a timely manner.
There is a decent chance that once he moves to 2.5 or later, the proposed feedback tuning and larger failure cohort count will solve the issue without rate tuning. The reported issue with the destination is concurrency, not message rate. The OP's mandate to solve the issues with 2.1.5 is rather unfortunate. I'd strongly consider upgrading the legacy systems to 2.7.2 or 2.8.1, after getting a bit of familiarity with the new release on a test machine. -- Viktor.