lists.m4, exchange.m4: Check for bogus addresses when doing DNS lookups.

[exim-config] / lists.m4

diff --git a/lists.m4 b/lists.m4
index 8f12fd8fee20751bc497503d7376af5bca57fbc0..88ae8c8f9f3ca488a7f0a9e66dd151b8280e0034 100644 (file)
--- a/lists.m4
+++ b/lists.m4
@@ -43,6 +43,20 @@ hostlist allnets = <; \
        172.29.198.0/23 ; 2001:8b0:c92::/48 ; \
        2001:ba8:1d9::/48 ; 2001:470:9740::/48
 
+## Addresses which are likely to be bogus.  These are zero, loopback,
+## multicast, broadcast (IPv4), and blocks reserved for documentation.
+hostlist bogus = <; \
+        :: ; ::1 ; ff00::/8 ; 2001:db8::/32 ; \
+        0.0.0.0 ; 127.0.0.0/8 ; 224.0.0.0/4 ; 255.255.255.255 ; \
+        192.0.2.0/24 ; 198.51.100.0/24 ; 203.0.113.0/24
+
+## Addresses which are likely to be bogus as public mailservers.  These are
+## the generally bogus addresses, plus link-local and private use addresses.
+hostlist bogus_public = <; \
+       +bogus ; \
+       fe80::/10 ; fc00::/7 ; \
+       169.254.0.0/16 ; 10.0.0.0/8 ; 172.16.0.0/12 ; 192.168.0.0/16
+
 ## Domains we're authoritative for.
 domainlist thishost = @ : @[] : \
        ${map {${extract {${extract {1}{.}{$primary_hostname}}} \