SpamfilterN returnpath MTA options

Spamfilter MTA options:    (0 or 1)
The    (N=1-8) MTA options  control whether or not a synthesized Return-path: field is prepended to the message passed to the associated spam filter. (Return-path: fields are normally only added during final delivery; however, some spam filters may only be able to process envelope From address information if it is provided in a Return-path: field.) A nonzero value causes the field to be inserted. The default value is 0.

These options are new in 7.0-3.01 and aren&#x27;t available in previous versions, which never insert the field.

See also:
 * Spamfilter MTA options