We migrated from Win 2003 with Exchange 2003
to SBS 2008 with Exchange 2007.
Now we get this error every time a user sends an email to another user within our domain.
External emails are OK.
Also getting a "connect to sites" prompt asking for a user name and password every time we do anything in outlook (eg start outlook or send email).
My DNS looks like this - have I set it up wrongly?
(computer names obsucred for security reasons)