IMC - Inbound messages queuing

[jomorgan]

Help!

Two problems, most importantly our outbound mail is not reaching it's destination. We think messages are leaving our domain though it's difficult to tell - our service provider say there's no problem with their relay - which we can telnet to on port 25.
Along with this we keep getting messages that keep queuing in the Inbound Messages Awaiting Conversion. If we manage to clear them, more reappear later.

Any Ideas? Someone reckons our Service Account, could be corrupt?

 

[jerry1600]

Same problem here. Thought it was DNS. I turned off NDRs for senders, etc. Still no let up. We are not an open relay, but we are seeing tons of relay attempts here - like an unintended DoS attack. Been happening for days and we are choking.

Same problem as these posts:

Tons of IMS queued messages with no originator--spam? - thread10-518095

DNS Issues - thread10-615290

HELP!