253344 - Messages with blank subjects shouldn't thread (at least not on the basis of subject)

Status: RESOLVED DUPLICATE of bug 223931

(SeaMonkey :: MailNews: Message Display, enhancement)

Description

[Thomas Hedden]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7b) Gecko/20040316
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7b) Gecko/20040316

If you receive a message with a blank subject from one person and leave it in
your mailbox, and then receive another unrelated message from another person two
weeks later which also has a blank subject, then the new message will become
part of the thread of the first blank-subject message (assuming threading is
turned on).

Reproducible: Always
Steps to Reproduce:
1. Create a message with a blank subject and send it to yourself.
2. Wait until you receive other messages, then create another message w/o subject.
3. Etc., or get a friend to do the same.

Actual Results:  
All blank-subject messages become part of the same thread.

Expected Results:  
IMHO, if a message has a blank subject, then it should NOT become part of a
blank-subject thread UNLESS it is a response to a particular blank-subject
message, in which case it should become part of the thread of the message to
which it is a response, assuming that it is possible to create threads according
to a criterion other than subject. If this is not possible, then blank-subject
messages should not become part of any thread, and should appear at the bottom
of the new message list (when sorted by date/time, that is).

I save a lot of messages, and I have an old one with no subject. Once in awhile
I get a new, unrelated message with a blank subject. Every time this happens I
have to go back several months looking for the new message.

Comment 1

[Bogdan Stroe]

*** This bug has been marked as a duplicate of 223931 ***