When we shut off barracuda spam filter device all outgoing mail works however incoming mail does not? I have checked exchange settings, dns records on the server from top to bottom and have not found anything that points to the barracuda device. When I open telnet and type in mail.domain.com 25, it says
220 barracuda.ourdomainname.com) ESMTP (d3bb5396e085a7dd0413fb4fc0e4ef6d)??