Caps in Emails

To the best of my knowledge, emails are not case sensitive. I just sent an email to john.doe@domain.com. It bounced with the message "(after RCPT TO): 554 Sorry, no mailbox here by that name. (#5.1.1)" . I then sent it to John.Doe@domain.com and it went through.



I'm assuming that someone set up the email filter to be an exact match (case sensitive). Anybody have any other ideas?

via Small-Business-Forum.net http://www.small-business-forum.net/website-management/10108-caps-emails.html