Stephen J. Turnbull a écrit le 01/09/2023 à 16:17 :
Gilles Filippini writes:
Now I have added an internal docker network 172.29.0.0/16 and configured exim4 to relay from this internal network only. Since this network is not accessible from the host, IPv6 spammers are blocked (*).
But since this modification mailman alters every emails with DMARC mitigation.
Any hint how to debug this issue?
Mailman has three levels of DMARC mitigation: never, as-needed, always. If you have it set to as-needed, Mailman will look for the DMARC policy as the DNS TXT record for _dmarc.domain-of-from.tld. If it can't get a reply it assumes the worst (p=reject) and applies the mitigation.
You can
- set mitigation to never
- give Mailman a way to connect to a DNS server.
You're right, thanks!
I remember now that I had to set up only one network interface for mailman-core because when I add another one to enable internet access then exim4 cannot reach mailman-core anymore:
Sep 1 15:08:09 lists exim[1004]: 2023-09-01 15:08:09 1qc5km-0000G9-2u H=mailman_core.exim4_internal [172.29.0.3] Connection refused
How can I fix that?
Thanks again, _g.