Temporary file not being deleted

Greetings,

I am currently using gotmail-0.8.1. I have been using gotmail for at
least a year and have been very satisfied with it. We use it for our
small network here pulling about a half dozen Hotmail accounts. Each
user runs a script that pulls their account and send them to postfix to
deliver to the user with spam checking (Spamassassin) and virus
detection (Clamav).

Recently, I have noticed an excessive number of temporary files
remaining in the /tmp directory every day. There is over one hundred for
the last two days. They seem to be related to error in the gotmail log
but I can not say there is a one-to-one correspondence to errors. 

Does gotmail delete temporary files on errors? If not, should it? If it
does, what needs to be configured?

Can I delete the temporary files after gotmail completes execution? I
currently delete them after two days.

Thanks,
Jens