helo and ehlo

Please assist me with the laymans understanding and use of helo and ehlo from the cmd prompt in relation with port 25 and SMTP.

How do I use the above commands to troubleshoot port 25 and SMTP in a Exchange 2003 environment?

Thanks

lazikAsked:
Who is Participating?
 
shalabhsharmaConnect With a Mentor Commented:
EHLO is the Enhanced SMTP (ESMTP) version of HELO. ESMTP adds a number of essential additions to the SMTP protocol. When this command is sent, the server will respond with the EHLO options that is supports.

 If you use ESMTP with EHLO and a server only supports SMTP (HELO) then your sending server
will fall back to HELO so ESMTP should work with older servers as it will fall back to HELO if needs be.

SMTP (HELO) is the old basic text based version whereas ESMTP (EHLO) will support graphic rich emails etc.  

I believe pretty much every server supports HELO so you would be fine using it i guess, but would be disadvantaging yourself if you were intending to send rich
0
 
shalabhsharmaCommented:
0
 
Barry GillChief of StaffCommented:
you wouldn't necessarily use these commands to troubleshoot a connection to Exchange 2003.
Basically if you chose helo or ehlo you would already be connected to Exchange so should be looking elsewhere for your trouble.

What exactly is the issue you are trying to troubleshoot?
0
 
lazikAuthor Commented:
Looking for the commands you would use to troubleshoot issues from the cmd prompt and some basic layman terms on what on how helo and ehlo work.
0
 
lazikAuthor Commented:
Thanks much.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.