Alias password alias option

Password protection for postings:  (string)
The  alias option specifies a password, or a comma-separated list of passwords, that allow  posting to the list. An attempted posting to the list must contain one of these values on an Approved: header line in order for the posting to  be allowed. During mailing list expansion, the password value will be removed from the Approved: header line; indeed, if that is the only  value on the Approved: header line, then the entire header line will be  removed. See Password-protected mailing lists.

In legacy configuration, the analogous alias file named parameter is.

For aliases/lists defined in LDAP, the analogous setting is the LDAP attribute named by the  MTA option.

See also:
 * Alias options
 * Password-protected mailing lists
 * Alias file named parameters
 * ldap_auth_password MTA Option