modify the subject

Hi all,

@first thx4help

I want to add the word "spam" to the subject for every incoming suspect mail.
Up to now i get only a few (20 per week) spam mails, so i think i can  put the 
senders
address to my recipe.(if known) -- or is this stupid ?
No mail should be killed, only rename the subject.

Here is my  test recipe: 

:0fhw
* ^From:.*(all(_at_)microsoft(_dot_)com)
| formail -A "Subject: Spam"

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