AFAIK, i thoguth the email.old.txt files only get created when switching between ascii and unicode logging or something, although i may be wrong
EDIT: I found the following quote in
chat logs renamed to .old.txt
quote:
Originally posted by Patchou
This kind of thing happens when switching ANSI <-> Unicode in the preferences. Thsoe two modes can't be mixed so Messenger Plus! is forced to create a new file to be able to log.