I received a read-receipt from a squirrelmail user. A header in the body part of the message was:
However, us-ascii is a charset, and not an encoding. Valid encodings are: 7bit, 8bit, base64, quoted-printable, etc...
This produced erros in the mailserver and I guess spamfilters are not too happy with this.
Also in this mail, the text was "raw" quoted. characters outside the ascii-range (in this case the ä) was not properly escaped.
Log in to post a comment.