Forcedreceivedfrom Channel Option

Received: from clause content )
(New in 7.0.5.37) The  source channel option is used to specify the text string that appears as the   within the  "  "  clause value in any Received: header fields that are generated. The default, if  is not specified, is for the " " clause value to be  generated in the usual way from the value of the remote client&#x27;s HELO/EHLO command and its IP address.

Specifying an empty string as the  value causes the " " clause to be suppressed. Note that the " " clause is required by the Received: field syntax specified in RFC 5321 but is optional in the syntax specified in RFC 822.

See also:
 * Internal host names in Received: and Message-Id: header lines
 * Headers channel options