This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
SMTP error from remote mail server after RCPT TO:<email@example.com>:
host promdeva.com [126.96.36.199]: 550-Verification failed for <firstname.lastname@example.org>
550-Previous (cached) callout verification failure
550 From email address must be valid