Absolute URL for images

Hello:

I'm using the lastest version of FCK-Editor on a CMS to create/edit content (text and images).

I'm using the CMS content pages to
autogenerate daily newsletters and i need the editor to assign ABSOLUTE URL to images by default in order to display those images inside any mailbox.

I'm doing it manually rigth now but, for 100 (3 image) new articles a day it slows down process speed.

Anybody has a good advice? Your help would be very much appreciated, thanks.

Cheers,