Delayed mail with remote mail exchangers

[bowes]

Hi, I am using CWP DNS + Slave DNS. I have clients using Office 365 email and mail is being delayed by sometimes close to a day. I can only sort out that the server thinks it is responsible for email to those domains.

The only way to set the mail exchanger as remote is to add a dummy email address so I can set the exchanger as remote. Doesn't help and possibly makes the matter worse.

This is crippling me at the moment and I'm running out of ideas. Any suggestions?

[bowes]

Have had to give up on CWP DNS and subscribe to 3rd party DNS. A disappointing turn of events.

[rcschaff]

MX is handled by DNS.  Simply editing the DNS without doing anything in the mail server itself should suffice.