Outlook problems?

I really didn't know where to post this issue. I'm helping someone in another state with her problem with email. I think it could be a virus or something, but I'm not sure. When she sends email, she ends up sending the email multiple times. The sent mail seems to never leave her outbox until she deletes it. It also never makes it to the sent folder. She is using Outlook Express. Basically the email keeps getting sent until she finally deletes it from the Outgoing folder.

Thanks in advance.

Never mind guys, I figured out what it was. I never use Outlook Express, so I was a little clueless. She just had too many files in her sent doc folder.