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Check & follow below KB article... 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 Does anyone have any ideas?   Thanks!! Does anyone have any suggestions?Edit: fixed table break. Check This Out

Click the LOGIN link in the forum header to proceed. My math students consider me a harsh grader. See rfc1893 and rfc2034 for information about enhanced status codes. Attention: Support and help on the Untangle Forums is provided by volunteers and community members like yourself. website here

500 Syntax Error Command Unrecognized Smtp

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 idea? 10-07-2009,08:57 PM #3 hinzinho Untangler Join Date Sep 2007 Posts 43 If you have a Cisco Router, try turning off the SMTP firewall. 10-07-2009,09:18 PM #4 mencargo Master Untangler If you are on any, check the links find out why find out how to fix it.

It's not access control, I removed gwac.db for testing, but same result. They are often referred to as Extended SMTP (ESMTP) commands or SMTP service extensions. The only way so far to solve this problem is for me to check the "Send HELO instead of EHLO" box in Exchange. Mxtoolbox Thanks!

Reply codes in numerical order Code Meaning 200 (nonstandard success response, see rfc876) 211 System status, or system help reply 214 Help message 220 Service ready 221 Service closing Helo Vs Ehlo Should I serve jury duty when I have no respect for the judge? Big Frickin Disclaimer: While I'm pretty sure, I can't guarantee that I know what I'm doing. view publisher site Chip If you would like to refer to this comment somewhere else in this project, copy and paste the following link: SourceForge About Site Status @sfnet_ops Powered by Apache Allura™ Find

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] I started a separate thread - http://forums.untangle.com/networkin...html#post79492 - because I thought it strange that the ETRN SMTP verb is being denied by Untangle when connected from the mail server LAN side To start viewing messages, select the forum that you want to visit from the selection below. Ad Choices SMTP reply codes See rfc2821 for the basic specification of SMTP; see also rfc1123 for important additional information.

Helo Vs Ehlo

This is fine but we use Postini to spam-filter incoming mail which means our MX records do not match our sending IP. I'd still like to understand why this is happening. 500 Syntax Error Command Unrecognized Smtp students who have girlfriends/are married/don't come in weekends...? Test Smtp Telnet The AUTH command sends the clients username and password to the e-mail server.

The example below shows how AUTH LOGIN can be used to make an authenticated login: S: 220 smtp.server.com Simple Mail Transfer Service Ready C: EHLO client.example.com S: 250-smtp.server.com Hello client.example.com his comment is here If the connection can be closed the servers replies with a 221 numerical code and then is the session closed. If the message is accepted for delivery, the SMTP server will response with a 250 reply code. STARTTLS (Start Transport Layer Security) E-mail servers and clients that uses the SMTP protocol normally communicate using plain text over the Internet. 500 5.3.3 Unrecognized Command

Can my boss open and use my computer when I'm not present? Disable it for a moment, and if it does the trick check the Xunlei/KuGoo threads. I'm not using Protocol Control. this contact form Odd, though.

All Rights Reserved. I understand that I can withdraw my consent at any time. S: 220 smtp.server.com Simple Mail Transfer Service Ready C: HELO client.example.com S: 250 Hello client.example.com C: MAIL FROM: S: 250 OK C: RCPT TO: S: 250 OK C: DATA S: 354

I switched our mail server to send HELO, and all mail is going through.

lordsatyr Wise, Aged Ars Veteran Registered: Aug 31, 2002Posts: 169 Posted: Fri May 12, 2006 12:30 pm Or it could be what is causing the problem of mail not going through. This command is usually sent as the first command after the identifying and login process. MAIL FROM Specifies the e-mail address of the sender. Use the /v option and it will spit out lots of information on each stage including the ehlo it sends and the response it recieves.Otherwise maybe try 'telnet mail.remote.com 25' and

Browse other questions tagged firewall smtp telnet cmd.exe . I have connection with telnet now C:\Users\Student>telnet alt3.gmail-smtp-in.l.google.com 25 then it brought me here: 220 mx.google.com ESMTP c8si3296343qgc.94 - gsmtp I then type helo to make sure I'm connected which I Watson Product Search Search None of the above, continue with my search CSSMTP flags syntax error on HELO / EHLO command Technote (troubleshooting) Problem(Abstract) CSSMTP generates an error report for syntax navigate here This command also tells the SMTP server that a new mail transaction is starting and makes the server to reset all its state tables and buffers etc.

The client should not send an e-mail message that is larger than the size reported by the server, but normally it is no problem if the message is somewhat larger than S: 250 OK, message accepted for delivery: queued as 12345 C: QUIT S: 221 Bye *) The client sends the EHLO command again to the e-mail server and starts the It works, but I'd like to figure out what is causing this. 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).

Chazz Ars Scholae Palatinae Registered: Jul 26, 2000Posts: 1470 Posted: Fri May 12, 2006 11:41 am ++ to lordsatyr's telnet solution. Too many args after 'HELO' command Cause CSSMTP expects the HELO / EHLO command to follow the syntax as described in RFC 2821. Anyways, I would get an error message from them stating that we are blacklisted if this was the case, which is not happening. 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.

If you don't know the SMTP commands to type into the telnet session, you can google for them. Servers that ignore the VRFY command will usually send some kind of reply, but they will not send the information that the client asked for.