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Ehlo Syntax Error

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After that the DATA command has been sent to the server from the client, the server will respond with a 354 reply code. It works, but I'd like to figure out what is causing this. I have read other posts on the internet that sometimes ISA Server causes problems with ESMTP EHLO messages. Article written by: Mika Larramo Skip to main content Country/region [ select ] Home Business services IT services Products Support & downloads My IBM developerWorks AIX and UNIX Information Mgmt this contact form

S: 250 OK, message accepted for delivery: queued as 12345 C: QUIT S: 221 Bye In the example above an e-mail message is sent from [email protected] to [email protected] Related Articles SMTP Protocol / SMTP Server What is a Mail Server and How Does it Work? VRFY (Verify) This command asks the server to confirm that a specified user name or mailbox is valid (exists). Register Login Posting Guidelines | Contact Moderators Ars Technica > Forums > Operating Systems & Software > Windows Technical Mojo Jump to: Select a forum ------------------ Hardware & Tweaking Audio/Visual

500 Syntax Error Command Unrecognized Smtp

The command can be used to probe for login names on servers. Thanks a lot. 10-07-2009,09:52 AM #2 gueutzilla Untangler Join Date May 2008 Posts 38 I have try to disable Spam Blocker and establish a telnet session... Occulis Fremeni Ars Tribunus Militum Registered: Feb 2, 2001Posts: 1914 Posted: Mon May 15, 2006 1:13 pm Our mail server is only listed in NOMOREFUNN and SOLID, neither of which the This is fine but we use Postini to spam-filter incoming mail which means our MX records do not match our sending IP.

This is probably confusing the SMTP helper on the ASA. After a single dot has been sent to the server and the server has responded, a QUIT command is sent to terminate the session. Same error!!! Mxtoolbox There might be a better way to do this, and this way might actually suck.

Please retry or contact your administrator. Not very helpful. Helo Vs Ehlo http://exchangedeepthoughts.blogspot.com/2007/10/esmtp-and-pix-firewalls.html Marked as answer by Rock Wang– MSFT Monday, December 29, 2008 1:20 AM Thursday, December 04, 2008 4:35 PM Reply | Quote 0 Sign in to vote We don't have Browse other questions tagged firewall smtp telnet cmd.exe . The domain name or IP address of the SMTP client is usually sent as an argument together with the command (e.g. "HELO client.example.com").

Document information More support for: z/OS Communications Server All Software version: 1.11, 1.12, 1.13, 2.1 Operating system(s): z/OS Reference #: 1431808 Modified date: 2010-05-28 Site availability Site assistance Contact and feedback I'd still like to understand why this is happening. English equivalent of the Portuguese phrase: "this person's mood changes according to the moon" Which news about the second Higgs mode (or the mysterious particle) anticipated to be seen at LHC If you are on any, check the links find out why find out how to fix it.

Helo Vs Ehlo

What's the last character in a file? All Rights Reserved. 500 Syntax Error Command Unrecognized Smtp http://support.microsoft.com/?id=295725   Additionally check below links... Test Smtp Telnet But at least the username and password used with the AUTH command will stay encrypted.

The SMTP server can inform the client what is the maximum message size and the client can inform the SMTP server the (estimated) size of the e-mail message that will be weblink Advanced Search Forum Application Forums Spam Blocker Lite Telnet smtp session ehlo/helo 500 Syntax error Register Help Remember Me? If the senders e-mail address is accepted the server will reply with a 250 OK reply code. After the client has sent the EHLO command to the server, the server often sends a list of available ESMTP commands back to the client. 500 5.3.3 Unrecognized Command

Apparently that company had recently turned on reverse DNS lookup for mail connections (very few mail systems have this turned on because it slows delivery). The senders e-mail address is specified by the MAIL FROM command and the recipients e-mail address is specified by the RCPT TO command. Do "accountable", "responsible", "answerable" imply "blamable"? http://strongboxlinux.com/syntax-error/ehlo-500-syntax-error-command-unrecognized.php This command can be repeated multiple times for a given e-mail message in order to deliver a single e-mail message to multiple recipients.

Any help from a master untangler will be appreciated! - S 11-12-2009,11:25 AM #10 dwasserman Join Date Jun 2008 Location Argentina Posts 4,236 For my point of view, you have a Are there any saltwater rivers on Earth? I have seen other posts on the internet that certain people have trouble sending ESMTP through ISA, which is why I am leaning towards the idea that this is the culprit.

Thursday, December 04, 2008 4:22 PM Reply | Quote 0 Sign in to vote Hi,   I'm not backspacing at all, I tried to telnet to hotmail.com (mx1.hotmail.com 25) and I

In my case, telnet session crosses my firewall. 220 ************************************************************************************************************************** helo 250 mail.my-domain.com Hello [172.31.1.10] Or with the ehlo: 220 ************************************************************************************************************************** ehlo 250-mail.my-domain.com Hello [172.31.1.10] 250-XXXA 250-SIZE 250-ETRN 250-PIPELINING 250-DSN 250-ENHANCEDSTATUSCODES I believe that this is a function of the ISA Server, again, refusing interactive telnet or something. In official documentation these ESMTP commands are also referred to as SMTP service extensions. NOOP (No operation) The NOOP command does nothing else than makes the receiver to send an OK reply.

Part 1: Basic SMTP Commands Below are the basic SMTP commands described. students who have girlfriends/are married/don't come in weekends...? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed his comment is here How can I have low-level 5e necromancer NPCs controlling many, many undead in this converted adventure?

Occulis Fremeni Ars Tribunus Militum Registered: Feb 2, 2001Posts: 1914 Posted: Wed May 17, 2006 12:52 pm The problem ended up being a bug in an older version of IOS that Thursday, December 04, 2008 4:48 PM Reply | Quote 0 Sign in to vote Seems as though you are successfully connecting via telnet, but I'm not sure why your EHLO/HELO commands Look here if you want my advice on how to draw one.