Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.1) Gecko/20020826 With the settings set to quote the original email, Reply to a long email. Make it an email that is, for instance, a mail list digest. Make sure that the digest includes some email in the middle that has a "properly" notated signature. That is, a sig that starts with a line of text containing two dash/minus characters ("--"). The quoted reply will have the full digest email truncated at the first "--" sig. A sig over some number of lines of text should probably not be considered a valid "sig". If you really want to get sophisticated, a sig should be under, say, 10 lines, but could include more lines of "standard" boiler plate disclaimer junk. Recognizing those disclaimers could probably be done with some kind of Bayseian thing (specifically counting typical disclaimer words).

Bug 126149 may be related.

Also, bug 121424 seems to be related to this.

The problem is that mozilla does not know where a signature ends. Making dependent of bug 54570.

*** Bug 208668 has been marked as a duplicate of this bug. ***

This bug is the same problem as 54570 and one solution to it. This solution and others are already proposed there. See also: Bug 58406 - [RFE] let user choose signature separator Bug 216728 - Let delimiter behaviour with position of signature be overridden *** This bug has been marked as a duplicate of 54570 ***