insert image into email

[securehotel]

hi,
i have a user who sends out a lot of email in Horde and would like to have an image inserted into the emails to prove that that the email came from the proper server.
We dont want a full blown signature, when we tried to insert <img > tags into the signature, it doesnt come out, just a link to the image. The image is hosted on the server
i know i shoud be doing something with mod_rewrite but would like some help please.

[Pico_Train]

are you using the absolute path to the image?

<img src="http://www.yourserve.com/images/image.jpg">

put that in the code.

[securehotel]

yes, and that is what appears in the email.. the html tags.
i have tried with compile new message in html, compile in plain text and always the same result.
the way i receive the email has no difference, it always shows the meta tags.
I did see the IMP footer text files so tried in their, no joy.