I'm in trying to migrate from Exchange 2007(2007 Server) to 2013 (2012 R2 Server). Two different servers. I have changed the old server to legacy.domain.com and the new server is mail.domain.com. Both have their own external fixed ip addresses.
I have not migrated the mailboxes yet for the obvious reason that all is not well with my setup.
All old emails from exchange 2007 work as they should. Any email users created in Exchange 2013 will not send or receive. Emails just disappear nothing in any queues.
I can go to mail.domain.com/owa and if I enter a New user it logs in. If I enter an old user it changes me automatically to legacy.domain.com and logs me in.
I have tried added the external ip address for mail.domain.com to my mcaffee spam filter but it says connectivity test failed for the following smpt host: ip address: host accepted a connection but failed to return an smtp banner within 30 seconds.
When I try to telnet into mail.domain.com 25 the screen goes blank and as soon as I hit any key it returns me to the command prompt.
Telnet to legacy.domain.com works fine.
I have the sonicwall pointing the external ip of mail.domain.com with port 25 pointing to the new server. If I point it to the old server all is well but ,well, that's no good.
Any and all help would be greatly appreciated.