What to do with this kind of Spam?

[Johannes Klug]

Hello Bogofilter - Mailing list.
Recently I receive more and more emails cointaining weird strings of 
characters. Zsfslatfnsa for example.
I attached a message that I got some minutes ago.
Will adding this message to my bogofilter spam list do any good? Or will it 
spoil my list with these weird strings?

Have a look for yourselves.

Best Regards,

Johannes Klug
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