I've started getting an error on my windows machine when sending an email through Windows Mail, using Mobile Me:
An unknown error has occurred.
Subject 'Test' Server Error: 503 Server Response: 503 5.7.0 TLS already in use. Server: 'smtp.me.com' Windows Live Mail Error ID: 0x800CCC65 Protocol: SMTP Port: 587 Secure(SSL): Yes
I've checked and double-checked my credentials, and outbound mail settings, and they're correct. I've deleted and re-added the account, and I get the same issue.
I'm able to receive email fine.
Note - this issue only affects one PC - my laptop has no issues.
Any suggestions on what Error 503 means, or how I would fix this?