Hello everyone and thank you for your time responding to this. I have a Dell Insperion, Windows Vista and Outlook 2007. I can receive e-mail and attachments fine. I can send e-mail without attachments as well. If I send an e-mail with attachment, especially large ones, outlook will either not send the mail at all or it will send the mail, leave it in the outbox and resend it over and over until I manually delete it. Talk about making a new customer mad! Any and all help will be greatly appreciated.