On Sun, Aug 06, 2017 at 04:42:09PM -0500, Eric Johnson wrote: > It can be very aggravating when an ISP still blocks port 25. With the > great expansion of smart phones and people getting e-mail on them, it gets > in the way far more than it helps. You can't expect every smart phone > user to change the SMTP settings for every hot spot where they want to use > it.
Correct, and that's what submission (587) is used for, which normally is open as it most likely require authentication.
