Hi Jean-Francois, When I was in charge of the email server at a local company, we moved to Bell and found we were on an IP address that was blacklisted. We were in a range of IP addresses that Bell provided as DSL. So they were in fact dynamic before we got them. You have to find out who the blacklists are run by, and ask for your specific IP address to be made an exception, or a range of IP addresses in the case of that company. We had a block of 16 IP addresses, IIRC. As an alternate solution, if your email client, instead of your email server, is configured to send mail through the Rogers SMTP server, you will have no problem with such blacklists, because the server-of-record is then Rogers. Errr, unless Rogers' mail server is sending enough spam to be blacklisted. :) Rob -- Rob Echlin, B. Eng. Automation Delivers! http://talksoftware.echlin.ca Ottawa, ON Mobile: 613-266-8311 ________________________________ From: Jean-Francois Bilodeau <jfbilodeau [ at ] chronogears [ dot ] com> Cc: linux [ at ] lists [ dot ] oclug [ dot ] on [ dot ] ca Sent: Tuesday, January 13, 2009 3:46:48 PM Subject: Re: [OCLUG-Tech] Rogers and Sendmail I run a mail server using a static IP, but for a while, GMail would refuse any messages from my server, saying that it was a dynamic IP. I've enabled SPF on my DNS server, and that seemed to fix the problem. However, I'm curious to know how a server can know if an IP is static or dynamic. How can you find out? __________________________________________________________________ Instant Messaging, free SMS, sharing photos and more... Try the new Yahoo! Canada Messenger at http://ca.beta.messenger.yahoo.com/