enable ipv6 for incoming connections

provider blocks outgoing ipv6, but we can receive mail on ipv6 so
enable it.

diff --git a/conf.d/main/02_exim4-config_options b/conf.d/main/02_exim4-config_options
index 9b5c1dc..47c8782 100644 (file)
--- a/conf.d/main/02_exim4-config_options
+++ b/conf.d/main/02_exim4-config_options
@@ -229,8 +229,10 @@ queue_run_max = 10
 # hcoop-change: disable smtp_enforce_sync (https://bugzilla.mozilla.org/show_bug.cgi?id=538809)
 smtp_enforce_sync = false
 
-# hcoop-change: disable ipv6 because exim seems unaware we can lookup AAAA but not actually reach them
-disable_ipv6 = true
+# hcoop-change: disable outgoing ipv6 -- digital ocean is blocking
+# outgoing smtp on ipv6, but incoming works fine.
+disable_ipv6 = false
+dns_ipv4_lookup = *
 
 # hcoop-change: disable pointless ident check
 rfc1413_hosts =