Issues emailing office365

[ryanccarter]

Just wanted to give you a heads up that emailing something that is hosted at office365 will fail with:

454 4.7.0 Failed to establish appropriate TLS channel: Access Denied (in reply to RCPT TO command))

I was able to fix this by adding the following to main.cf:

smtp_tls_security_level = may

[ryanccarter]

This appears to work as well:

smtp_tls_security_level = encrypt