sendmail, 4th Edition

${auth_author}

RFC2554 AUTH= parameter V8.10 and later

As part of the RFC2554 authentication scheme, a client can ask whether a user other than the envelope sender is allowed to authenticate on behalf of the envelope sender. This is done by adding an AUTH= parameter to the MAIL From: keyword:

MAIL From: <[e-mail]> AUTH=address

This ${auth_author} macro is assigned the address that followed the MAIL From: AUTH= extension.

The ${auth_author} macro is useful for adding your own rules to the Local_trust_auth rule set. Note that a $& prefix is necessary when you reference this macro in rules (that is, use $&{auth_author}, not ${auth_author}).

Note that beginning with V8.13, the value to be stored into this macro is first xtext-encoded, then stored (Macro Xtext Translations on page 795).

${auth_author} is transient. If defined in the configuration file or in the command line, that definition can be ignored by sendmail.