Ehlo Syntax Error
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500 5.3.3 Unrecognized Command
Telnet smtp session ehlo/helo 500 Syntax error LinkBack LinkBack URL About LinkBacks Thread Tools Show Printable Version 10-07-2009,06:37 AM #1 gueutzilla Untangler Join Date May 2008 Posts 38 Telnet smtp session ehlo/helo 500 Syntax error Hello, I have a little problem with my UT 7.0. When I try to send a test mail via Telnet from internet, everytime, the first helo or ehlo command failed with this mxtoolbox message 220 ************************************************************************************************************************* helo 500 Syntax error, command unrecognized helo 250 mail.my-domain.com Hello [84.102.XXX.XXX] or 220 ************************************************************************************************************************** ehlo 500 Syntax error, command unrecognized ehlo 250-mail.my-domain.com Hello [84.102.XXX.XXX] 250-SIZE 250-DSN 250-VRFY 250-AUTH GSSAPI NTLM LOGIN 250 AUTH=LOGIN This error appear only from internet when the session crosses UT!!! Do you have an idea for fix it? 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... Same error!!! 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 Join Date May 2009 Location Mexico City Posts 121 Are you using Protocol Control? Disable it for a moment, and if it does the trick check the Xunlei/KuGoo threads. Do you have Firewall rules? 10-07-2009,09:19 PM #5 dmorris Untangle Junkie Join Date Nov 2006 Location San Carlos, CA Posts 15,121 definitely check kugoo and xunlei in protocol control Attention: Support and help on the Untangle Forums is provided by volunteers and community members like yourself. If you need Untangle support please call
Training Support Forums & community Events Rational Tivoli WebSphere Java technology Linux Open source SOA and Web services Web development XML My developerWorks About dW Submit content Feedback developerWorks>Lotus>Forums & community>IBM Lotus Notes/Domino 8.5 Forum (includes Lotus Notes Traveler) IBM Lotus Notes/Domino 8.5 Forum (includes Lotus Notes Traveler) Sign in to participate Subject: Domino 8.53 SMTP: HELO works, but EHLO does not Feedback Type: Problem Product Area: Domino Server Technical Area: Error Message Platform: Windows Release: 8.5.3 Reproducible: Always We have a Domino 8.53 server set up as our SMTP mail gateway. From an https://forums.untangle.com/spam-blocker-lite/11872-telnet-smtp-session-ehlo-helo-500-syntax-error.html internal host, connecting on port 25, I can connect manually and issue the HELO command and get a correct response. If I connect and issue the EHLO command, I get: "500 Syntax error, command "XXXX
Reply codes in numerical order Code Meaning 200 (nonstandard success response, see rfc876) 211 System status, or system help reply http://www.greenend.org.uk/rjk/tech/smtpreplies.html 214 Help message 220
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Super User Questions Tags Users Badges Unanswered Ask Question _ Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top telnet 500 Syntax error, command unrecognized up vote 0 down vote favorite I'm trying to send email using telnet in cmd. 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 should get a 250 ehlo 250-mx.google.com at your service, [103.16.169.202] 250 SIZE 35882577 The next command after receiving the 250 should be: mail from: