What is a Soft Bounce?
A soft bounce is a momentary email delivery failure
that typically occurs when the receiving Mail Server is temporarily unable to accept the incoming email. Soft bounces generally resolve themselves. However, after several attempts to re-deliver the email message, the bounce eventually reverts to a hard bounce, permanently removing the address to the cleaned list. Common reasons for soft bounce email delivery failure include a downed, overloaded, or unavailable server, the recipient mailbox is full, or the message is too large.