When emailing a person whose email is not whitelisted,
it would be nice to be able to automatically add that
email to a whitelist. That can be achieved by CC'ing
the outgoing email to a special email account designed
to perform such an operation or maybe even oneself.
Thus if i am emailing user A whose email is not
whitelisted, all I have to do is to CC or BCC myself on
that outgoing email and ASK would automatically add
user A to a whitelist after processing the email and
recognizing that a) my mail key is present and thus
this is not a spoofed/malicious email and b) user A is
not in the whitelist already.