When I try to delete messages from my inbox, rather than deleting them, it just puts a line through them. It's really annoying and I can't figure out how to fix it. This is with Outlook Express, not Outlook.
Unfortunately, that's all you can do. You are using IMAP, and you have to delete them, which causes the line, and then purge deleted messages. I had an IMAP account about a year ago and it used to drive me nuts.
Only solutions - switch to POP3 (if possible), or change your e-mail provider.
Well as I stated, Comcast can use POP3. So, if you are using IMAP for them, you have the option to switch. Unfortunately, however, some mail providers, AOL for instance, only do IMAP for downloading mail.