3 ms·

I guess the argument for inbound blocking is that its way too easy to configure an open relay which is then used to send spam.

• u801e 5y ago
  But the outbound block would prevent the relay from sending any mail over port 25, so there's no real point to block inbound connections.
  • xanaxagoras 5y ago
    I'm thinking the ISP in upstate New York misunderstood the situation in a way similar to the comment above you.
  • seedie 5y ago
    I've no argument beyond that. You're right.