mailto:, mail signature and S/MIME signature

Isn't it sufficient to just tab to the next header field?

You can force a specific sender using from as described here.

Isn't it sufficient to just tab to the next header field?

Sometimes I have to send >20 mails automatically generated und triggered by a Keyboard Mestro macro. It would be nice to be able just to send, after checking the mail.

You can force a specific sender using from as described here.

I use this already:

open "mailto:$KMVAR_toAddress?from=$KMVAR_fromAddress&subject=$KMVAR_subject&body=$KMVAR_body"

When I have the mail signature (the -- part) in the autogenerated mail and I click into the mail body (in the composer window) MailMate appends a second signature. MailMate should not append a signature automatically if I have written one "manually". Sometimes I start to write a mail with the "wrong" from address and when I change the address MailMate changes or appends the signature. Maybe it should ask if I want this?

(Sometimes I have to need to change the signature by hand but it is not worth to define this signature in the settings as this will end in too much slightly different signatures which I need very rarely).

And my request is to be able to specify a signature in the mailto-URI. Something like "sig=.