On 03.06.19 13:02, De Petter Mattheas wrote:
How can we secure are postfix smtp relay server?
complicated question...
For the moment we have a rule that only allow mail from exchange server adres to postfix (relay server),
show us.
but when somebody spoofs this address mail gets accept and you can send your mail to anybody as anybody.
your rule apparently has logical error.
So I know I can use these but we are not used of working with this. Can we setup another way of authentication?
it's hard to answer without knowing the real problem. You apparently don't require authentication and what you require is not what you want to achieve.
I would not like to setup users/mailboxes on the relay server, all are users are on the exchange server (AD), and postfix is are simple relay server we would like to secure.
-- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. We are but packets in the Internet of life (userfriendly.org)
