From 175349a224c210bceefe918dbe16d66738de8104 Mon Sep 17 00:00:00 2001
From: Marcus Ripkens <marcus@ripkens.eu>
Date: Mon, 4 Dec 2017 22:02:33 +0100
Subject: [PATCH] Added adress verification before accepting mails for delivery

See https://www.endpoint.com/blog/2015/05/28/postfix-address-verification

Block client until address verifiction is completed and mail will not be rejected by relaying MTA or smarthost.
If verification fails, mail is rejected.
If verification takes too long, mail is temporaryly rejected and sending client will retry later.
---
 core/postfix/conf/main.cf | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/postfix/conf/main.cf b/core/postfix/conf/main.cf
index fa442abf..d8c656c9 100644
--- a/core/postfix/conf/main.cf
+++ b/core/postfix/conf/main.cf
@@ -88,6 +88,7 @@ smtpd_recipient_restrictions =
   reject_non_fqdn_sender,
   reject_unknown_sender_domain,
   reject_unknown_recipient_domain,
+  reject_unverified_recipient,
   permit
 
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