! Don't try to send email to empty addresses (fixes #2541)

Signed-off-by: Michael Eshom <oldiesmann@oldiesmann.us>
Remove "empty()" check since trim already handles null

Signed-off-by: Michael Eshom <oldiesmann@oldiesmann.us>
Merge pull request #2542 from Oldiesmann/release-2.1

! Don't try to send email to empty addresses (fixes #2541)