> These probably have fixed IP addresses (if not, they should). Could you just > allow mail from them by IP address?
They do have fixed IP addresses. But I need to implement authentication so that they cannot just use any email address. For example: a device configured with an account must be able to send email with that "from" address only (both "mail from" and "header from"). _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org