451 4.1.8 Domain of sender address does not resolve...

[msweany]

I have been using Scalix Server for a couple of months (about 4-5) now with no problems.

Recently (about 2 weeks ago), I started having issues where no mail was going out, I ended up finding that my ISP DNS was having issue, along with some FW settings that I needed to change.

Now, since I had fixed it, I have been having issues.

I get the 451 4.1.8 error when I try to send mail out to alot of providers, specifically I am testing by sending to a gmail account and my work account (exchange server). From my work account, I have verified I can do an nslookup and resolve my scalix server IP and vice versa.

Any ideas on things I can do to fix this.

[ScalixSupport]

I think this post will do what you are after:

http://www.scalix.com/community/viewtopic.php?t=2578

Regards,
Don

[msweany]

Thank you!!

The FEATURE was already in there, but I removed some RBL's that I attempted to set up (I later read that there are other changes needed for those to work anyway) and rebuilt the sendmail file and ran omsendin.

Now it seems to be working...