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Port 25 blocked on my Static IP address since june 1st?!?
Been running an exchange 2010 server over assigned static IP address for years now. We moved to new location and transferred service receiving new IP address. Everything worked fine for last few months. As of June 1st all traffic started being blocked outbound over port 25. This is a business account not residential. How do I get help resolving this. I can telnet through port 587 to all the email servers that are stuck in my exchange queues. If I try to telnet over port 25 it will not connect. I am not on any block lists and the server has been locked down from being a relay server for years now. No settings changed server side. All test say ISP is blocking port 25. Please help we need to be able to send our emails to operate as a business.