How to check postfix server using telnet
Solution 1:
Google "check email server using telnet" no quotes
Some of your output may vary but if you do not get any errors and you receive the email from the email server you can know that emial is flowing properly.
Also im not 100% sure if this answers your qestion however this is the way the check your email server form command line.
Also when using telnet be careful as 1 typo means you have start all over again.
From the port25 website
Here are all the commands I have bolded the command you will need to type out vs the output you will see.
telnet mail.port25.com 25
Trying 69.63.149.30...
Connected to mail.port25.com (69.63.149.30).
Escape character is '^]'.
220 mail.port25.com (PowerMTA(TM) v4.0) ESMTP service ready
EHLO server.example.com
250-mail.port25.com says hello
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-CHUNKING
250-8BITMIME
250-XACK
250-XMRG
250-SIZE 54525952
250-VERP
250 DSN
MAIL FROM: <[email protected]>
250 2.1.0 MAIL ok
RCPT TO: <[email protected]>
250 2.1.5 <[email protected]> ok
DATA
354 send message
From: "John Smith" <[email protected]>
To: "Jane Doe" <[email protected]>
Subject: test message sent from manual telnet session
Hello World,
.
250 2.6.0 message received
QUIT
221 2.0.0 mail.port25.com says goodbye