451 4.1.8 Domain of sender address does not resolve...
Posted: Mon Oct 30, 2006 5:34 pm
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.
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.