Reject unlisted domain is one of many method to improve anti spam on email server, especially Zimbra mail server. On Zimbra, we can setup any IP address to listed as trusted network. IP address listed on trusted network, can sending email without authentication or prompt asking. In other words, listed ip address on trusted network can sending email ..
What is Policyd? Policyd is an anti spam plugin. Policyd have some module like quotas, access control, spf check, greylisting and others. Zimbra Collaboration Suite is an email server who use Postfix as engine for MTA. By default, policyd have been bundled with Zimbra from Zimbra version 7. Why we must use Policyd? Policyd have module ..