On Thu, Feb 10, 2011 at 10:50:20PM +0100, Jeroen Geilman wrote: >> and I'm not sure how >> smtp_connection_reuse_time_limit = 300s >> >> could be lowered in such a way that busy destination MXes are not >> keeping a lot of mail in the active queue...
The re-use time should equal or exceed the duration of the slowest reasonably plausible connection + transaction latency when one of the MX hosts is unwell (overloaded). If you drop all the other SMTP timers you can drop the re-use time-limit to match, or leave it higher, it does not harm if the servers don't object. -- Viktor.