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Compliance, abuse & spam issue

What are Out of Band Bounces (OBB)?

R

E

Compliance, abuse & spam issue

What are Out of Band Bounces (OBB)?

R

E

Compliance, abuse & spam issue

What are Out of Band Bounces (OBB)?

Understanding OBB (also known as Asynchronous Bounces):

  1. Definition:

  • Emails initially accepted by recipient server

  • Later rejected for various reasons

  • Bounce notification sent after initial acceptance

  1. Common Causes:

  • Invalid email address verification

  • Full mailbox detection

  • Delayed spam filter triggers

  • Server policy changes

  1. Best Practices:

  • Monitor OBB patterns

  • Process bounces promptly

  • Update suppression lists

  • Review sending practices

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