Eric Vaughn:
> The list of changes (we upgraded a spare server to swap in as a replacement):
> OLD NEW
> Centos 5.0. Centos 5.3 (yum update all)
> i386. x64
> 2.4 ghrz cpu. 2.83 ghrz cpu
> 4 gigs ram. 4 gigs ram
> Openssl 0.9.8b 0.9.8e (with all security updates included with "yum
> update all", which should have all available openssl patches)
My goodness, they replaced everything.
I think you first want to find out that Postfix can resolve DNS
properly. Do some tests inbound (smtpd) and outbound (smtp). A 5s
delay sounds like a bad resolv.conf file (or even bad resolver
libraries under /var/spool/postfix). Turn off chroot in master.cf.
Turn off all kinds of other stuff until performance changes then
investigate the guilty component.
Unfortunately I cannot provide lots if hand-holding. It's
not part of the deal.
Wietse
