E-mail sent by Discourse marked as spam (IPv6 reverse DNS missing)?

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1

community.openstreetmap.org sends me e-mail notifications when topics I follow change, however it ends in spam. The main reason (from which all of others problems derive), seems to be that while envelope-sender is valid VERP to catch bounces (e.g. replies+verp-xxxxxxx@community.openstreetmap.org), the From: header field is set to e-mail address community@noreply.openstreetmap.org whose FQDN seems not to have valid FCrDNS for its IPv6 address (but has is only for its IPv4 address).

  • Working IPv4 FCrDNS:

    % host -t mx noreply.openstreetmap.org
noreply.openstreetmap.org mail is handled by 10 a.mx.openstreetmap.org.
% host a.mx.openstreetmap.org
a.mx.openstreetmap.org has address 212.110.172.32
a.mx.openstreetmap.org has IPv6 address 2001:41c9:1:400::32
% host 212.110.172.32
32.172.110.212.in-addr.arpa domain name pointer shenron.openstreetmap.org.
% host shenron.openstreetmap.org
shenron.openstreetmap.org has address 212.110.172.32
shenron.openstreetmap.org has IPv6 address 2001:41c9:1:400::32

  • Failing IPv6 FCrDNS

    % host 2001:41c9:1:400::32
Host 2.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.0.1.0.0.0.9.c.1.4.1.0.0.2.ip6.arpa not found: 3(NXDOMAIN)

Could someone please add correct reverse DNS records for IPv6?

2

It’s not something we can do directly but I’ve reached out to the ISP that provide that machine for us to see if they can update it.

3 Likes
3

This should be fixed now.

2 Likes
4

Thanks @TomH

@Matija_Nalis can you check now and if so, mark this topic as solved? Thanks!