Next, as shown on the < left, click on the plus [ + ] at lower left to create a new filter.
Now then, as shown below, > type in a name for the new filter - here it's endo notices, and...
if it's for all mailboxes, leave the asterisk [ * ], otherwise
click the down arrow and select the mailbox to which the filter
applies, then click on the [dot dot dot] square by the long blank.
< Fill in the
information: in the example the defaults "From"
and "Equals" apply to what has to be typed in:
Now maybe that would be enough, but what if the postmaster tried to
send something that wasn't a notice that someone tried to send email
with an infected attachment? Click on the down arrow, select "AND,"
and then click on the [dot dot dot] square.
Almost
done. Here on the < left the
"Blacklist" default filter got unchecked and the "endo
notices" filter got checked.
Also, the default "Mark as spam" Action got unchecked and the "Delete from server" Action got checked. Note the "Use filters automatically" check mark.
It would be possible to move the filter just made to the top of the list by using the "up" arrow, but it is at the top with the Blacklist disabled, so
click OK.
Now those warnings get deleted at the server without downloading.