Scan originator MTA option

External filtering context MTA options:  (address)
New in 7.0.5. The MTA&#x27;s spam/virus filter package integration facility can be used in non-MTA (in particular, in non-channel) contexts, such as by applications or utilities such as ,  where certain fields inherently available for message processing in the MTA context are not necessarily naturally available. The   MTA option specifies the MAIL FROM address that&#x27;s used for such scanning operations. (There is no envelope in this situation, but the MTA requires one, so a minimal pseudo envelope has to be constructed.) The default is the empty string.

See also:
 * Spamfilter MTA options
 * Sieve filter MTA options
 * scan_channel MTA Option
 * scan_recipient MTA Option
 * imexpire invoking spamfilter packages
 * External filtering context MTA options