Access auth MTA option

Access mapping table MTA options:  (bitmask)
(New in MS 8.0) The  MTA option is used to cause inclusion of additional authentication information in mapping probes. This is a bit-encoded field; currently two bits are defined. If bit 0 (value 1) is set, the value of the SMTP MAIL FROM command&#x27;s AUTH parameter is included in the   mapping probe immediately following the authenticated sender address. If bit 1 (value 2) is set, the canonical username result produced by authentication is included in the   mapping probe immediately  following the SMTP AUTH parameter. The default value for this option is 0.

See also:
 * Access mapping table MTA options
 * FROM_ACCESS mapping table