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Postfix: The Definitive Guide by Kyle D. Dent

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Name

soft_bounce

Possible values:

yes/no

Default:

no

Specifies whether or not mail that would normally be bounced should be queued for redelivery attempts. Also converts any permanent rejection codes to temporary error codes. This parameter is useful for testing out configuration changes to make sure that no mail is permanently rejected.

Example:

soft_bounce = no

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