The imap server doesn't handle sending of mail, you have to look into whatever SMTP daemon you setup. I believe RedHat still uses sendmail by default and all you'd need to do is add blah.com to ...
Gmail is really shaking things up now! Seems that a select few are getting a nice surprise in their Gmail settings… IMAP!! If you don’t know what IMAP support is, then check out the FAQ listed on ...