hiding X-Originating-IP / hostname in email header

Is it possible to set the X-Originating-IP in the email header to the server's IP address?
I've used some ticketing software before configured with SMTP to use the server IP and hostname, but now i'm looking for a webbased or desktop email client that can do the same.

- I don't want to use a proxy.
- I don't want to use ticketsoftware
- I prefer a webbased email program i can install on my shared hosting server.
A desktopclient is ok too, but it must be possible to block HTML emails otherwise my IP can be traced anyway.

Any ideas?

P.s. I'm not a spammer.

 

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