How Can You Test Connectivity to a SMTP Mail Server?.

In case you are not able to send mails from Siebel and needs to test the connectivity of  Siebel Servers to SMTP mail servers. This post will help you for sure.

Obtain the IP address of the SMTP Mail Server

Example:

mail.askmesiebel.com

Obtain the numerical IP address to confirm which host you are connecting to.
From a Microsoft Windows or UNIX command prompt type the following:

nslookup <IP address>

For example:

nslookup mail.askmesiebel.com

Sample output:

Server: mail.askmesiebel.com
Address: 10.xxx.xx.xx

Ping the numerical IP Address

This checks if the SMTP server is both up and reachable. Ping is the standard utility for checking connectivity between two hosts on a TCP/IP network. It verifies connectivity at the Internet Protocol (IP) level. It is also useful for testing responsiveness of the network from the time it takes the ping packet to traverse the network.

At the command prompt, type:

ping <numerical IP address>

Sample output:

Pinging 10.xxx.xx.xx with 32 bytes of data:

Reply from 10.xxx.xx.xx: bytes=32 time=260ms TTL=122
Reply from 10.xxx.xx.xx: bytes=32 time=240ms TTL=122

Test SMTP connectivity from the Siebel Server

Tests if the SMTP service is up and running on the SMTP Server. Port 25 is
the standard port number for the SMTP service. At the command prompt, type:

telnet <numerical IP address> 25

For example:

telnet 10.xxx.xx.xx 25

A separate telnet window should open.

Issue a HELO command to ensure that the server responds. The interactions should look like the example below:

220 mail.askmesiebel.com ESMTP Service (Lotus Domino Release 5.0.3) ready at Thu, 21 Jan 2016 02:27:33 -0700

HELO mail.askmesiebel.com

250 mail.askmesiebel.com Hello mail.askmesiebel.com ([10.xxx.xx.xx]), pleased to meet you

QUIT

221 mail.askmesiebel.com SMTP Service closing transmission channel

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