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Re: Delays between connecting to port 25 and SMTP banner?

From: mouss (mlist.onlyfree.fr)
Date: Tue Mar 06 2007 - 16:12:46 CST


H. Wade Minter wrote:
> I've set up a new mail server for a client with Postfix 2.2.9 on SuSE
> Enterprise Server 10. I'm running into an odd issue that I haven't
> seen before - an itermittent delay between connecting to port 25 and
> receiving the SMTP banner. That leads me to believe that it's
> something in my postfix config. I'll restart postfix, and it'll seem
> to be fine, only to revert to delays the next time I check.

probably a dns issue (postfix does a double dns lookup).
make sure to use a dns server that correctly resolve all addresses,
including internal ones.