How to remove Source headers from the email?

[Wajdan]

Hello everyone,
I am facing issues in removing source email headers from the email being sent from my server. How can I do it?

Currently I have many websites hosted on single server and dedicated IP addresses have been assigned to different websites and I have set to use dedicated IP to send emails. Howerver, when I trace email source I get hostname of our main server in addition to dedicated IP . This is potentially harmful for hackers and attackers to know the main IP of our server.

What I want is to remove X-source headers from the email and if I have set dedicated IP as sender IP then only that IP and it's PTR record should be shown in source rather than complete server details. How can I go about it?

 

[24x7server]

Hi,

This may be something difficult and that there are chances of mails from your server be marked as SPAM if source is altered with the information that the remote mail server may want to see.. However, if you wish to hide your IP address and secure your emails, you can check for options like sendgrid or spamexperts..

 

[cPanelMichael]

Hello @Wajdan,

Removing that information from the email headers will possibly lead to your server getting blacklisted by remote mail servers as it's often used to validate legitimate email senders. That said, while unsupported, you may find some of the information in the following threads useful as proof-of-concept:

SOLVED - Easy FIX your SMTP banner, SMTP greeting and Reverse DNS for Dedicated IPs
How to edit exim configuration so it do not reveal "Received: from" in headers?

Thank you.