How to change SMTP Banner, Helo,ehlo Greetings for Zimbra

1-take Zimbra Backup or VM snapshot before doing any changes

2-enter the following command to change SMTP Banner:


# Su-zimbra

$ zmlocalconfig-e postfix_smtpd_banner= "yourmailserver.yourdomain.com"


3-then If you want to change Helo/ehlo names, enter:

$ Zmprov mcf zimbramtamyhostname yourmailserver.yourdomain.com


4-if want to disable adding x-originating (Client's Internal-lan IP) to email headers:


$ Zmprov mcf ZIMBRASMTPSENDADDORIGINATINGIP FALSE

5-then Restart Zimbra Services:

$ Zmcontrol Restart

How to test whether it is working:


1-telnet to your mail server from Windows cmd or Unix GNU Telnet client

Telnet yourmailserver.yourdomain.com 25


-It firewall allows you to access, doing telnet to port should get your server to greet if you have yourmailserver.yo Urdomain.com


2-in Telnet, type following to get HELO response


> Helo yourmailserver


You should get:


Yourmailserver.yourdomain.com


3-in Telnet, type following to get EHLO response



EHLO Yourmail


You should get:



Yourmailserver.yourdomain.com


Rest of EHLO lines according to Yoru server config, such as MTA mail size, startls



How to change SMTP Banner, Helo,ehlo Greetings for Zimbra