if your auth senders spoof from headers: block their login account and terminate their service
Am 02.10.18 um 21:17 schrieb Stefan Bauer: > Hi, > > we're running a small smtp send only service for authenticated users > only. Even though we only accept allowed combinations of authenticated > user and pre-defined envelope from addresses with access_maps, some > smartasses started to spoof From: addresses so we got bad reputation at > receiver sites. > > Is this a good idea to check if envelope from and from matches and if > so, howto do it in postfix? > > thank you > > Stefan
