A three digit code sent back to the server when an email bounces (cannot be delivered). A code beginning with four shows a bounce is temporary, a code beginning with five means the bounce is permanent.
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TwoLine
A three digit code sent back to the server when an email bounces (cannot be delivered). A code beginning with four shows a bounce is temporary, a code beginning with five means the bounce is permanent.
with a Booster program for Healthcare companies.
