Has there been a fix for this yet? I've tried DIGEST-MD5, CRAM-MD5, LOGIN, PLAIN and empty, and none of them work. I'm using RC with hmailserver. I get the little pink box every time saying "Failed to send message" the error log says:
SMTP Error: SMTP error: No From address has been provided
in sendmail.inc on line 253
Not exactly sure where to go from here...?