SMTP: Troubleshooting the TCP/IP Layer of the Mail GatewayLast reviewed: October 20, 1997Article ID: Q115492 |
3.00
MS-DOS
kb3rdparty
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SUMMARYIf the SMTP gateway cannot connect to the mail routing host or receive incoming mail, the TCP/IP layer may not be working properly. This article describes how to troubleshoot the IP and TCP layers.
Testing the IP LayerTo test the IP layer, use the PING command from the gateway PC up to the host and from the host down to the gateway PC:
Testing the TCP LayerTo test the TCP layer, use the TELNET command with a "25" after the host ID or IP address to specify the mail socket. Run it from the gateway PC up to the host and from the host down to the gateway PC:
telnet tcpiphost.company.com 25 telnet msmailgwy.company.com 25 NOTE: You can't run the second command unless the gateway is running.If this succeeds, you receive the response "220 ...." from the destination host. Type QUIT to end the test. Successful completion means the TCP layer is working.
NOTE: If you use -cd (debug) and -lacsy (full logging) the 220 response is recorded in the LOG file. |
Additional reference words: 3.00 errors
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