Name
smtpd_expansion_filter
Possible values:
characters
Default:
(see example)
List of characters that are allowed in macro expansion by the SMTP server.
Example:
smtpd_expansion_filter = \t\40!"#$%&'( )*+,-./0123456789:;<=>?@ \ ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~
Get Postfix: The Definitive Guide now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.