Lethe's Ccielogs

Hello all and happy new year! Even if I should be on holiday I'm working from home, and while I'm waiting for me colleague to call me back from the office I've thought to post this sharing something I use often.

In my work I often deal with Mail servers, which were and still are my field of specialization, and one of the most basic tasks I deal with when installing new servers is checking SMTP daemon (or service) is working properly, as you know this is pretty easy to accomplish opening a telnet connection to the server we want to test and writing the verbs needed to the SMTP daemon. This is pretty easy and standard but I'm a lazy person and this morning while testing a new server I've written this little and dirty script to do the job for me

Here we go :

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#!/bin/sh
( echo HELO ccielogs.com
sleep 2
echo MAIL FROM:<test@somedomain.com>
sleep 2
echo RCPT TO:<test@someotherdomain.com>
sleep 2
echo DATA
sleep 2
echo Subject:Test-Mail!
sleep 2
echo If you can read this, it Works!!!
sleep 2
echo .
sleep 2
echo QUIT
) | telnet XXX.XXX.XXX.XXX  25

To make this work all you have to do is to modify the Mail From and Rcpt to fields so that valid sender and recipients are listed (this is not strictly necessary but would help being able to read the test mail just to be extra sure), last modification needed is of course the IP address of the server to test.

Once copied all you have to do is to save the file as smtp.sh (or whatever name you like) and make it executable or launch it with sh smtp.sh.

For your convenience I've also attached the script at the end of the post with a TXT extension so that you can rename and use it in your environment.

If you you found this useful or informative please take some time to digg and share the article!

Lethe.

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Article by Lethe

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Daniele Catanesi, aka Lethe, is the mind behing Lethe's Ccielogs. He is a veteran of the IT industry with more than ten years of experience in the various fields. Daniele has been mainly working as IT Architect and Trainer for a lot of Enteprise customers implementing cutting edge technologies and complex solutions. Daniele currently holds various certification among which MCITP, CCNP, LPI, Citrix and working tirelessly to his RHCE and RHCA. When he is not busy working or studying for the next exam he writes on the blog trying to give administrators and students around the world tips and suggestion to help them succeed in their career and job.