Sam Varshavchik wrote:Yes, they can. SMTP's twin sister, the mail submission protocol, uses port 587, which will be unaffected by Earthlink's stupid firewall.
Perhaps. But why assume it won't be blocked?
Why assume that it will be?
I'd expect them to block it in a New York minute.
Why do you expect that? If they were going to do that, they would've done that already. Port 587 is not a new invention. It's been here for a while.
The justification for blocking port 25 is to prevent their customers from hijacking open relays, and having to deal with the resulting complaints. By definition, port 587 requires authentication, and cannot be hijacked.
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