I have an hmail server configured and I know that comcast blacks port 25. I have setup a dynu service for relay and port 25 redirect. Port 2525, 25 465 587 110 143 are opened on my router and pointed to the IP of the mail server. I have gone to No_IP.com and edited mx to use the mx1.dynu and mx2.dynu.com entries..here is a dump of my Hserver diagnostic window:


Test: Collect server details
hMailServer version: hMailServer 5.6.7-B2425
Database type: MSSQL Compact

Test: Test IPv6
IPv6 support is available in operating system.

Test: Test outbound port
SMTP relayer is in use.
Trying to connect to host relay.dynu.com...
Trying to connect to TCP/IP address 168.235.105.136 on port 587.
Received: 220 relay.dynu.com ESMTP.
Connected successfully.

Test: Test backup directory
Backup directory C:\mailback is writable.

Test: Test MX records
Trying to resolve MX records for dktucsonmail.ddns.net...
Host name found: mx1.dynu.com
Host name found: mx2.dynu.com

Test: Test local connect
Connecting to TCP/IP address in MX records for local domain domain dktucsonmail.ddns.net...
Trying to connect to host mx1.dynu.com...
Trying to connect to TCP/IP address 207.38.69.195 on port 25.
ERROR: It was not possible to connect.
Trying to connect to host mx2.dynu.com...
Trying to connect to TCP/IP address 107.161.27.201 on port 25.
ERROR: It was not possible to connect.
ERROR: Was not able to open connection.

Test: Test message file locations
Relative message paths are stored in the database for all messages.

Test: Test IP range configuration
No problems were found in the IP range configuration.