Unable to receive SMTP

I have a Domino 6.51 server on W2k SP4 that is unable to receive any incoming SMTP mail, outbound works. This is what I have tried;1. Connect it directly to the internet without any firewall.

  1. Change the MTU.

  2. Tested using port 80 instead of 25.

  3. Tested with two other machines.

  4. And much more.

I can connect to the server on port 25 with telnet and send a mail as long as I am on the LAN.

Here is what the log says, I have SMTPDEBUG=2 and SMTPDEBUGIO=3 in notes.ini.

2004-05-11 22:50:13,10 [0878:0007-04F4] SMTP CIServ Listen> Connection Accepted on Port 25 for Session 02790004

2004-05-11 22:50:13 SMTP Server [0878:0009-05DC] State change from Greeting to Greeting

2004-05-11 22:50:13 SMTP Server [0878:0009-05DC] Processing in Greeting state

2004-05-11 22:50:27,66 [0878:0009-05DC] SMTP CITask SendErrorHandler> ERROR: (65.54.187.121) Send failed (did not timeout), error = 0A02h (Remote system no longer responding)

2004-05-11 22:50:27,68 [0878:0009-05DC] SMTP CITask SendErrorHandler> Running default hanlder, error = 0A02h (Remote system no longer responding)

2004-05-11 22:50:27 SMTP Server [0878:0009-05DC] State change from Greeting to Connected

2004-05-11 22:50:27 SMTP Server: bay18-f71.bay18.hotmail.com (65.54.187.121) connected

2004-05-11 22:50:27 SMTP Server: bay18-f71.bay18.hotmail.com (65.54.187.121) disconnected. 0 message[s] received

Any ideas are welcome.