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