Received from psb b via Groups.Io at 10/3/2018 11:31 AM UTC:
P.S. Is there a way to eliminate permanently those 2 little dash marks that appear before the customized signature?
Please no.
Those two dash marks (actually "dash dash space") are "cut marks." They allow some email programs to know where a signature and other material extraneous to any response to that message begin so they can automatically cut it out of any response.
Jim H