20 Barracuda Host Or Domain Name Not Found In This Year

And got the following issue i think this should be some postfix configure.

Barracuda host or domain name not found. Also if you change this value you must restart postfix not just reload. Use email tool to send email to a test user i e. Undelivered mail returned to sender submitted by mailer daemon localhost on 02 02 2017 at 00 23 54.

Just by adding the host name in the hosts file and sending mail abc host dom will not work. Cname no cname record found. Can you verify tht the dns server being used by the barracuda is able to resolve the domainname.

If you get a 451 domain not found error it means that you are trying to relay outbound mail through the barracuda email security service bess from an ip address that has not been registered with account. It s not the connection that fails but the dns lookup that precedes it. Synchro feb 26 15 at 11 51.

You can check the resolving by going to advanced troubleshooting and using the dig ns lookup field. I have postfix running with dbmail except one thing. You can also try a tcpdump from there is you want.

This is most likely not a barracuda issue. A dns query for somedomain gov says. The mx record for the domain host must be resolve able.

Good morning i receive lots of emails as undeliverable that look like. Host or domain name not found. This means the barracuda cannot resolve the domainname.