Solved: Mail Server Error “message body contains illegal bare CR LF characters”

A Chilkat user reported suddenly getting an error message from two receiving mail servers when sending mail generated by Chilkat.

The message is:   message body contains illegal bare CR LF characters

 Solution:  The cause has been found. The affected users are using AVG or Avast Antivirus and there is an optional signature text added after the outgoing email scan. If turned off, it works normally again.