|have you tried going to the web-based email from your provider and sending an e-mail from there?|
I quit using OE for that same problem...TROUBLE TROUBLE and after switching to a web-based e-mail don't have those problems anymore. OE has a LIMITED size mailbox whereas the web-based ones don't have limits. Also much better spam protection in web-based and you NEVER have to change your e-mail address when changing ISPS....Just a thought....it's up to you.
People think because they use for example comcast....that you HAVE to use your comcast e-mail address...WRONG! That is only for if you have problems with your ISP.
If you think of changing you might try Yahoo (my favorite) or Hotmail which I think is Live Mail now.
Some HELP in posting on Computing.net plus free progs and instructions Cheers