24May
How to Force STARTTLS on Outlook and other clients
I am currently writing an essay about securing e-mail. Now I'm at the point where I want to know if it's possible to force TLS in connections via SMTP or POP3/IMAP from the clients' side. I know I can configure the client so it uses STARTTLS, which would opportunistically use TLS if available, but I don't know if I can force the client to use only TLS.
Background of this idea will be that no downgrade attack will be possible without noticing.
Does anyone know if there is such an implementation in circulation for Outlook (Or other mail agents)?
