Is there a method in Rails to digitally sign emails sent via
ActionMailer? I was thinking a long the lines of hashing the entire
email, body and headers, as well as a salt. Then the hash could be
added to the headers as the email's signature.
I was thinking this could be a good way to determine if a recipient of
my emails is receiving spoofed emails. If in doubt, they could submit
the email to an online app that would do the necessary hashing to
determines its authenticity.