Article:
  How to Set Up Encrypted Mail on Mac OS X
Subject:   Case sensitivity?
Date:   2004-11-23 13:34:16
From:   legacyb4
Response to: Case sensitivity?

Yes, case sensitivity seems to be an issue with verifying the signature in Mail. My outgoing work address on my Exchange server was set as UserName@domain.com and the certificate was registered to username@domain.com.


While Outlook didn't seem to mind, Mail balked at wanting to verify the signature; after correcting the outgoing address to all small caps, Mail now shows no warnings.