Brian.
Just being a bit curious I tried telnet...
1. From Windows 8/64b (IP 87.251.250.110)
2. From my server 44.165.2.2
Got almost the same:
Trying 44.0.0.1...
Connected to 44.0.0.1.
Escape character is '^]'.
220
gw.ampr.org ESMTP Sendmail 8.15.2/8.15.2; Thu, 13 Jul 2017
09:52:33 -0700 (PDT)
Best regards.
Tom - SP2L