maildrop .mailfilter recipe to add task to taskwarrior via email

gistfile1.txt

#----------------------------------------------------------------------
# add a task to taskwarrior                                            
#----------------------------------------------------------------------

if (/^From:.*VALIDSENDER@EXAMPLE.COM/ && /^To:.*taskwarrior@/)              
{
  # save a copy
  cc "$MAILDIR/.task/"

  # extract subject and add task
  xfilter "reformail -x Subject:"
  /[[:alnum:][:blank:][:punct:]]*/
  log "add task $MATCH"
  `task add +frommail due:today "$MATCH"`
  exit
}