Hi, just today some external mail isnt reaching our users. We are running Exchange 2003, the connection to our ISP is fine so its not a dodgy network connection.
I went to dnsstuff.com and ran the dnsreport for our domain. It came back with mostly pass except for:
"WARNING: One or more of your mailservers is claiming to be a host other than what it really is...."
"Your domain does not have an SPF record...."
ERROR: I couldn't find any A records for ourdomain.com. But I did find a referral to www.ourdomain.com
Some external senders are reporting that the mails are bouncing back...theories???