We have relationships with some banks that are trying to implement some secure email. Is there any method that would force the server to send emails via TLS when sending email to a specific domain? This is a cpanel/WHM server.
We basically need to require that an email be secure from user -> mail server and from mail server -> bank's server.
I'm not entirely familiar with what happens after the email leaves my email program. If I send a message over TLS or SSL outgoing connection, does the email leave the mail server also over a secure connection? I have no problem implementing TLS from the client to the mail server. It's after it gets to the mail server that I am unclear on.
Any help on this would be appreciated.