Thunderbird will find the IMAP server, and fail to find the outgoing SMTP server. If you want to use IMAP, you can leave this as it is. I If you want the POP service instead, change '''imap.vt.edu''' to '''pop.vt.edu'''. Change the <code>Outgoing:</code> field to '''auth.smtp.vt.edu'''. The other settings will be corrected automatically, so they may be left as they are.