My problem started about 15 days ago. Some e-mails simply do not come to my server or take hours or even days to come. I have a PIX 515-R with 8.0(2) software version and "inspect esmtp" is activated. When I ran "debug esmtp", I got some messages like this one: "SMTP: State kept, no EID to use!!!".
I tried to deactivate ESMTP inspection, but I got no results at all.
What is happening with my system? Do you have any glue?