Hi,

I need to insert a custom header in all outgoing emails.
No problem, defined it, and put a
%SETHEADER(myHeaderName,"someBlahBlahEnglishLettersOnly")
in my templates.

I want to know if this is safe - is it possible spam filters to delete/mark as spam a message that has a header which is non-standard?
Or some email apps to have a problem displaying such messages?

thanks