Incoming and Outgoing mail servers doesn't work with domain, only with IP

[nekys]

Incoming and Outgoing mail servers doesn't work with domain, only with IP
When I try to send with any mail client one email, I get an error that mailserver is not found. If I change that mailserver domain (mail.blabla.com) with server's IP, works perfect. Now if I telnet Exim, responses perfect. What I did wrong? Was working before.

 

[scsi]

guess your hosts are not resolving then... check your dns server.

 

[floyd]

If you want any real help read this.