My MTA does announce itself as a domain name. All the forward and reverse lookups are set up correctly. Steve Philips suggestion seems the most plausible at the moment. So I will look into that when I return to work on Monday. If you know of how to stop my sendmail MTA from adding a period to the end of its hostname, I would appreciate the info, as this is what Steve suggests is the problem. Thanks. -----Original Message----- From: redhat-list-admin@xxxxxxxxxx [mailto:redhat-list-admin@xxxxxxxxxx] On Behalf Of Jeff Lasman Sent: Sunday, January 04, 2004 9:28 AM To: redhat-list@xxxxxxxxxx Subject: Re: Sendmail configuration problem? Some servers refusing to receive mail from me... On Saturday 03 January 2004 03:33 pm, MKlinke wrote: > -----> ehlo <your_ip_addr> > [<your_ip_addr>], pleased to meet you This in and of itself, could cause a problem. Some people are blocking (as a perhaps ineffective anti-spam measure) email from domains that announce themselves with an IP rather than a domain name. Perhaps the safest way to test is to try it with whatever your server uses when it does an ehlo. Perhaps do a lookup on the IP# you're trying to connect from, and then use the name it shows you as the ehlo argument. Jeff -- Jeff Lasman, nobaloney.net, P. O. Box 52672, Riverside, CA 92517 US Professional Internet Services & Support / Consulting / Colocation Our blists address used on lists is for list email only Phone +1 909 324-9706, or see: "http://www.nobaloney.net/contactus.html" -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list