I get a lot of emails that are obviously sent using
random characters but I also get emails where the
address is slighly mispelled (typo). It would be
useful is the magnets could have wildcard expressions
for accept/deny. Even a basic '*' for whole field
and '?' for a single charactger would be good. Of
course there is a temptation to use full regex but
some users would not be able to understand it. Even
so, a basic [A..z,a..z,0..9] pattern matching subset
would do the trick for 99% of cases.