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MVP 11.0: Invalid EHLO Header Format when MarkVision Messenger is used with SMTP Server

Document ID:SO3553

Usergroup :External


MVP sends invalid EHLO header to SMTP host; MVP sends invalid HELO header to SMTP host; MVP sends SMTP hostname in EHLO header; MVP sends SMTP hostname in HELO header; Messenger failing; Messenger fails to connect to SMTP server


MarkVision Professional (MVP) 11.0; MarkVision Messenger (MVP) 11.0


Problem Description

MVP's Messenger service is using _mvpServer in the originating EHLO (HELO) command header when negotiating a handshake with the SMTP server.  Messenger appears to be using the SMTP server hostname (_mvpServer) instead of MVP's server hostname.

Proper Handshake Values

The MVP messenger command header values used during the initial handshake with the SMTP server should look like this:  EHLO <Hostname*> <FQDN**>
(i.e. EHLO
*    computer name for MVP server (Moi)
**  fully qualified domain name for the computer running MVP server (


The plug-in MessengerHelo v 1.2 changes the MVP behavior to obtain the line: EHLO

    1. Download the file and unzip it.

    2. Install the plug-in on your MVP server.  (For information on how to install MVP plug-ins, click here.)

    3. Reboot your MVP server. (Click here for instructions.)

Still Need Help?

Please contact Lexmark Technical Support for additional assistance.  NOTE:  When calling for support, you will need to know the printer model type and serial number. 
Please call from the MVP server location in case the technician asks you to perform a task involving the MVP server software. 

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