Comment Re:So will verizon FIOS now open port 25? (Score 1) 299
telnet is the debugging tool I use when a daemon isn't working right. I've used it to see the HTTP headers returned (in the days before browsers made this easier). I've used it to test postfix plugins. I'll occasionally use it to send email when my local MTA is offline. I've used it to get more insight into SMTP, POP, and IMAP configuration errors. It's usually for debugging, but sometimes for bootstrapping.
The only thing I don't use telnet for (anymore) is remote logins.