Testing Email Services

This Linux terminal command set can be used to test email services

Step 1 : Connect to correct network. This will allow you to connect the service

Step 2 : Open Linux terminal and run bellow command. Then press enter key
             telnet email-service-host 25
             email-service-host is the IP address or hostname of email service


Step 3 : Type bellow content. Then press enter key
              EHLO MAIL

Step 4 : Type 'from' address. Every email service will configure with relevant from mail address. Then press enter key.
              mail from:noreply@abc.com

Step 5 : Type 'to' address. Type your email address. From and To email address should be in same domain. Then press enter key
              rcpt to:test@abc.com            

Step 6 : Type 'data' and enter to enter email content. Then press enter key
              data

Step 7 : Type the email content. Then press enter key
              This is a test mail.

Step 8: Press enter key

Step 9: Type '.' to send the mail.

Step 10: Check your mail



Sample Output


dev64@dev64 ~ $ telnet mailhost.yourdomail.lk 25
Trying 192.168.4.35...
Connected to mailhost.yourdomail.lk.
Escape character is '^]'.
220 yourdomail.lk ESMTP Smtpd; Fri, 6 Dec 2019 09:51:46 +0530
EHLO MAIL
250-yourdomail.lk Hello , pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE 209715200
250-DSN
250-STARTTLS
250-DELIVERBY
250 HELP
mail from:noreply@yourdomail.lk
250 2.1.0 noreply@yourdomail.lk... Sender ok
rcpt to:saminda.konkaduwa@yourdomail.lk
250 2.1.5 saminda.konkaduwa@yourdomail.lk... Recipient ok
data
354 Enter mail, end with "." on a line by itself
Test mail content
.
250 2.0.0 xB64Lkmg026459-xB64Lkmh026459 Message accepted for delivery
 

Sample Output


dev64@dev64 ~ $ telnet mailhost.yourdomail.lk 25
Trying 192.168.4.35...
Connected to mailhost.yourdomail.lk.
Escape character is '^]'.
220 yourdomail.lk ESMTP Smtpd; Fri, 6 Dec 2019 09:51:46 +0530
EHLO MAIL
250-yourdomail.lk Hello , pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE 209715200
250-DSN
250-STARTTLS
250-DELIVERBY
250 HELP
mail from:noreply@yourdomail.lk
250 2.1.0 noreply@yourdomail.lk... Sender ok
rcpt to:saminda.konkaduwa@yourdomail.lk
250 2.1.5 saminda.konkaduwa@yourdomail.lk... Recipient ok
data
354 Enter mail, end with "." on a line by itself
This is a Test Content
.
250 2.0.0 xB64Lkmg026459-xB64Lkmh026459 Message accepted for delivery