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Postfix: The Definitive Guide by Kyle D. Dent

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Name

smtpd_banner

Possible values:

template

Default:

(see example)

Text that follows the 220 status code in the SMTP greeting banner. If you change this parameter, be sure to include $myhostname at the start of the text, according to RFC requirements.

Example:

smtpd_banner = $myhostname ESMTP $mail_name

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