- log in to your Servage webmailer: https://webmail01.servage.net/
- click on "Settings" (top left on the page):
- choose the tab "Filters" in the menu on the left side
- push the "+" on the bottom of the page and define your filtername and the rules for the filter
- push the button "Save" to apply the filter
Below is the screen shot of an example filter.