One of my associates sent an email to me that was also sent to a client. The client's email address appears to be mangled, however. He says he sent it twice---the first one bounced and the second did not.

The email address he sent it to was: [email protected]

My searches on Google indicate that the MAILTO could be a bad protocol but I didn't know how the email address would be interpreted by exchange server.

What email address was the email sent to, how did IMCEMAILTO get there, and does it have any change of getting delivered?