Visit Jeremy's Blog.
Go Back > Forums > Linux Forums > Linux - Networking
User Name
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.


  Search this Thread
Old 12-04-2006, 10:19 AM   #1
Registered: Jun 2003
Location: SoCal
Distribution: CentOS
Posts: 465

Rep: Reputation: 30
Email HELO Question

What does the receiving mail server do with the HELO message? Does it perform a dns lookup of the domain name or ip address given? Or does it do something else? Thanks!
Old 12-04-2006, 10:39 AM   #2
Registered: Jun 2003
Location: SoCal
Distribution: CentOS
Posts: 465

Original Poster
Rep: Reputation: 30
Nevermind, I did a few more searches and found the answer here:

" reject_unknown_hostname
Reject the request when the hostname in the client HELO (EHLO) command has no DNS A or MX record. The unknown_hostname_reject_code specifies the response code to rejected requests (default: 450)."


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
helo fqdn restriction dlublink Linux - Software 1 10-13-2006 09:26 PM
Helo people! newbie1104 Member Intro 1 01-15-2006 06:10 PM
helo me digdug4life Linux - Software 1 11-04-2005 06:33 PM
Postfix: Bad HELO???? emilioestevezz Linux - Networking 2 05-11-2004 11:20 AM
Helo My name is Frederic fmasi Member Intro 2 04-02-2004 12:06 AM > Forums > Linux Forums > Linux - Networking

All times are GMT -5. The time now is 04:27 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration