Victor, Thank you for your answer.
> On Mon, Apr 18, 2011 at 07:27:25AM -0300, Eduardo M. Stelmaszczyk wrote: > > > I'm having problems with mail accumulating in the incoming queue under > > heavy load (2500+ SMTPd processes). The queue manager stops for a long > > time once in a while after trying to communicate with the "trace" client, > > as shown in a trace from cleanup below: > > Are you using "reject_unverified_sender" or "reject_unverified_recipient"? > > http://www.postfix.org/DEBUG_README.html#mail I'm using none of these specific options, however I DO refuse mail during the SMTP session using reject_unknown_recipient_domain and reject_unknown_sender_domain. > Is the load the cause or a symptom of the delay? What non-default > entries are found in your master.cf file? There are some non-default entries, aside from the fact that the Postfix version I'm using is a bit modified. I'll check out the non-default parameters and post them here (I'm assuming you meant "main.cf", am I right?), but for now I can say that the the following binaries have customizations on them: - Cleanup - Bounce - Smtpd - Pickup - Anvil I haven't made the changes myself, but I need to support them (from a sysadmin perspective) for now. Also, it's vital to say that qmgr ISN'T modified in any way. As for the load being the cause or symptom, it's definitely the cause. I'm sorry, I should have been more clear on that. The load is absolutely expected, since the servers handle a large amount of mail per day. What I'm trying to accomplish with this investigation is to squeeze a bit more of the hardware I already have. Regards, Eduardo
