rspamd external relay module

[ilyadel]

Hello,

I'm selfhosting an addy instance using docker on a VPS, but I'm not exposing SMTP port of my VPS to internet, I'm using another email service as an MX and it forward all recieved email to my instance :

Email from internet --> external relay MX --> selfhosted Addy

To get rspamd ignore the external relay that forward email to my instance, and do security checks on the "real" sender, I'm trying to use rspamd external relay module https://rspamd.com/doc/modules/external_relay.html without success

I added two files via volume mapping to addy container :

/etc/rspamd/local.d/external_relay.conf (strategy = "hostname_map" ) :

And /etc/rspamd/local.d/maps.d/external_relay_hostname.map :

rspamd seems to accept the module as I can see it in Modules enabled and logs:

But rspamd still consider the external relay MX as the sender. So if the the "real" dmarc sender is configured to quarantine/reject, dmarc policy is applied (quarantine : add a header, reject : reject the email). (If the dmarc policy is set to none, emails are forwarded correctly)

lua; external_relay.lua:187: found nothing useful in Received headers

Did any one use this type of configuration ?