Alias_error_text alias option
alias_error_text alias option specifies a string to use as the "reason" which will be returned to the attempted sender if and when an attempted posting fails due to an access failure, overriding the usual error text that would be returned in such a case. For groups defined in LDAP, see the
mgrpRejectText attribute or
mgrpMsgRejectText attribute (or more precisely, whatever attribute(s) are named by the
ldap_reject_text MTA option).
For aliases defined in the alias file or alias database, the analogous setting is the [ERROR_TEXT] alias file named parameter.