[bug-myserver] Invalid plugin source

[Frans Houweling]

Hi Giuseppe,
sorry to bother you again. I can't seem to get rid of the (red) "Invalid 
plugin source" message, not even if I limit the MIMEtypes handlers just 
to "SEND".
Another question: what happens if the same file extension is associated 
with different MIME types? Is the last entry used?
Thank you very much for your help

Cordiali saluti - kind regards
Frans Houweling