Test your SMTP Server with this blog

By: Ahmar
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1. Press Windows+R – or go to the Start menu and select ‘Run’.
2. Type in telnet smtp.server.com 25 and press OK
If the SMTP server is up and running and there is no issue, you will see 220
response;

220 serverDNSName.server.local Microsoft ESMTP MAIL
Service, Version: 8.0.9200.163
84 ready at Mon, 14 Jul 2014 15:56:14 -0500

If the SMTP server is not using port 25, then replace 25 with the port number
that is in use.

3. Type the following statement:

ehlo test.com

If everything is okay, you will get the following results:

250- serverDNSName.server.local Hello
250-TURN
250-SIZE 5242880
250-ETRN
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-8bitmime
250-BINARYMIME
250-CHUNKING
250-VRFY
250-TLS
250-STARTTLS
250 OK

4. Further proceed with testing by sending the email from within telnet as follows:
Type in and press enter after every line:
mail from: aa@alligatortek.com
rcpt to: bb@alligatortek.com
data
Hello Hello, Testing 1 2 3 Hello
Let’s see if the email works from this sender to this recipient.

Thanks,

You will see the following output;

250 2.1.0 aa@alligatortek.com....Sender OK
250 2.1.5 bb@alligatortek.com
250 2.6.0 <serverNameGR881Np7vXee00000057@serverDNSName.server.local> Queued mail for
delivery

The email will be send to bb@alligatortek.com. If the email is not sent or if a failure response is received, try steps 1 through 4 from the SMTP server itself. If it works from the server – but not from your local computer – check the firewall settings on the server.

The email will be send to bb@alligatortek.com. If the email is not sent or if a failure response is received, try steps 1 through 4 from the SMTP server itself. If it works from the server – but not from your local computer – check the firewall settings on the server.

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