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Postfix: The Definitive Guide by Kyle D. Dent

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Name

default_verp_delimiters

Possible values:

characters

Default:

+=

VERP is a technique used with mailing lists to handle bounced messages. It combines the list owner address and original recipient address with a special delimiter character. The default_verp_delimiters parameter specifies which characters to use when constructing VERP return addresses.

Example:

default_verp_delimiters = +=

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