In the past there has been a separation of a site I manage from it's email. We've had problems sending emails from the site to emails on the same domain so I've decided to bring the email management back into the site. I've left the external pop3 accounts in place, added all the email accounts and forwarders to the directadmin control panel. The DNS settings now have an MX record that matches those of my other sites. However when I use Outlook to test a new pop3 account I get errors. I tried using the telnet command but that failed. Is this just a matter of waiting for dns settings to propagate or is there something else I need to do? EDIT: just checked another domain (that works) and telnet fails there too so it's probably the firewall that kills that test.
you tried with telnet on the default telnetd port (23) instead trying port 110 (pop3) and 25 (smtp). Try again and give us some results.