We have Exchange 2003 with a Barracuda SpamFirewall as the Gateway. I need to enabled SMTP/TLS and I am trying to get a signed cert for this to install on my Barracuda. My question is we send email from our server from two different domains.
What kind of cert will validate both email domains? I just worry that if I buy a cert that says mail.address1.com when someone from @address2.com sends a TLS email the cert will not match the address and that could cause some problems.