> Okay, it's time to post this here. > A client of mine has a sendmail server that up until 2 days ago has worked > flawlessly. Then, suddenly it started slowing down. Nothing in top showed > anything beating the server, save minor memory useage on some httpd child > instances. Restarted httpd, same issue: slow. Restarted sendmail, same. > Checked iptraf. There seemed to be alot of DNS queries. Hmmm...stopped > sendmail and the dns queries subsided. Thing is, they weren't really > hammering > the system. Anyway, checked mqueue and there were some messages in there > that > were basically bogus or spam requests. Removed them. Things seemed to be > better today, however, something new is happening. One user, and only 1, > gets > rejected. We have sendmail setup to use spamcop and spamhaus and this user > is > having her outgoing mail rejected using that. This is odd. This user is on > a > 192.168.0 subnet and so is everyone else. They all work and use Outlook > clients. They have the option of using the webmail client which is working > for > her with no problem. She only gets an error when using Outlook. I'm > really > stumped, though it may be an easy answer. Anyone? What do logs say ? How far from stock configuration has the sendmail config changed ? are you using TLS ? what services pack/OS is on the machine ? does it work with different clients (OE, Eudora, pegasus mail ?) what happens when spam filtering is not enabled ? do you use SMTPAUTH ? What do the reject messages say ? does her IP resolve to a "valid domain" according to the mail server ? do other peoples ? A little more information may be helpful. -- Steve. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
