The Alias(es) field on the Admin tab of an Action allows for optional input of one or multiple aliases, e.g. "mailfile_icon_action" or "mailfile". 

Such aliases can be used to

NOTE that the alias(es) of an Action may NOT contain the following characters:
, (comma)
: (colon)
! (exclamation mark)
| (pipe)
< (less than)
> (greater than)
and newlines.