1. SELECT THE E-MAIL CATEGORY FOR WHICH YOU WISH TO CHANGE THE SUBJECT HEADER FROM THE TOP DROPDOWN MENU.

2. THEN CLICK THE "SELECT" BUTTON.

3. PLEASE CLICK THE "NEW RULES" SYMBOL IN THE "DELIVER TO ..." LINE.

4. KLICKEN SIE MIT DER MAUS AUF DIE MARKIERUNG LINKS NEBEN DER ZEILE "SCHREIBE SUBJECTHEADER UM IN".

5. NOW ENTER THE INFORMATION YOU WISH TO APPEAR IN FUTURE SUBJECT HEADERS.

Then click the "Add action" button.

In this example, the category is to be inserted as a prefix to all subject headers for the "Spam" e-mail type:

[Spam]: Original subject 

6. TO SAVE YOUR SETTINGS, PLEASE CLICK THE "SAVE ALL" BUTTON.

Now you can introduce additional settings as you see fit.

IMPORTANT: The "Discard Changes" button cancels all modifications made to the e-mail type in question.