3 ms·

> when they abruptly started to filter inbound port 25 Didn't you mean "outbound"?

• dsr_ 10y ago
  No, I didn't.
  • loup-vaillant 10y ago
    I don't understand. Many providers block the outbound 25 port because of their distrust of the infected computers of their end losers. What could possibly be their rationale for blocking the inbound 25 port?
    • angry_octet 10y ago
      A lot of ISPs say you are not allowed to run 'servers' on your home internet, and hence block inbound low ports like SMTP, IMAP, http. It's just extortion.
    • zaxomi 10y ago
      Incompetence. At least that was the reason why my ISP at the time blocked both outbound and inbound port 25. It took a couple of weeks to convince them that they where wrong and open for inbound again.