Addresssrs, noaddresssrs, destinationsrs, nodestinationsrs, sourcesrs, nosourcesrs Channel Options

Controlling Sender Rewriting Scheme (SRS) rewriting
(New in MS 6.3p1.) Sender Rewriting Scheme (SRS) rewriting is used by sites providing autoforwarding services to encapsulate MAIL FROM addresses so as to avoid running afoul of  Sender Permitted From (SPF)  checks. In order for an address to undergo SRS rewriting, SRS support must be configured and the following three conditions must be met: (1) The current source channel must be marked with the  option, (2) The current destination channel must be marked with the   option, and (3) Rewriting the MAIL FROM address must have matched a channel marked with the   option. ,  and   are the default for all channels.

See also the  and   channel options.

See also:
 * SRS MTA options
 * SPF MTA options
 * spfhelo Option
 * Addresses channel options
 * Channel options
 * SRS and Relay Blocking