While mail servers may be configured to silently discard email, the SMTP RFC strongly discourages this unless senders are recognised to be fraudulent or unwanted. For all other mail, the RFC endorses returning undeliverable mail by having an mistake code. Mind the regulation – To pressure all over again, https://itsupport23221.ampedpages.com/little-known-facts-about-powermtasend-email-54230185