Sendmail showing internal IP and hostname. How to change?

struct · 05-31-2011, 03:11 PM

Hi guys,
Bit stumped on how to disable or modify the email headers showing the internal IP and hostname of the server when using sendmail. I want this removed or change to just a domain name.

Can someone direct me to the right direction on how to do this?

Thanks in advance!

smallpond · 06-02-2011, 11:46 AM

Quote:

Originally Posted by struct

Hi guys,
Bit stumped on how to disable or modify the email headers showing the internal IP and hostname of the server when using sendmail. I want this removed or change to just a domain name.

Can someone direct me to the right direction on how to do this?

Thanks in advance!

There's no simple way because it violates RFCs to not add a Received header and there is no good reason to do it.
If some auditor is telling you it improves security, then hire a different security auditor.

That said, you can hack /etc/mail/sendmail.cf to change the part that looks like:

Code:

HReceived: <whole bunch of weird sendmail macros>

and then hope you never need to track down an email problem.

struct · 06-11-2011, 10:19 PM

Quote:

Originally Posted by smallpond

If some auditor is telling you it improves security, then hire a different security auditor.

Hahaha. I want to but it's not within my power to do so.
But thanks so much for the info. I just need to somehow get rid of the internal IP and hostname from showing up in the header.