On 3/8/23 16:02, Bernardo Reino via Postfix-users wrote:
Here some quick notes from my configuration (related to SPF/DKIM/DMARC checking,
i.e. when receiving e-mails):

SPF and DKIM are enabled by default, and at least I didn't need to have any
local config (which would go in local.d/{spf,dkim}.conf)

(DKIM signing is another matter, requiring configuration, but this is another
topic)

DMARC is also enabled by default,


OK, this is very useful information that's not obvious from the documentation. I have taken a leap of faith and made the tiny handful of Postfix configuration changes necessary to let Rspamd handle all of DKIM, DMARC, SPF instead of handing them off to OpenDKIM, OpenDMARC, and pypolicyd-spf.

I will be watching my logs closely for a while, exactly as I did after finally figuring out a working configuration to get fail2ban to talk to my physically-separate firewall host.

I also have enabled DMARC reporting, including a list of domains
to which no report should be sent (e.g. because they reject e-mails to the very
address they publish for this purpose..)

***
actions = {
    quarantine = "add_header";
# reject = "reject";
    reject = "add_header";
}

reporting {
    enabled = true;
    org_name = "BBMK";
    domain = "bbmk.org";
    email = "rep...@dmarc.bbmk.org";
    from_name = "Rspamd"
    max_entries = 1000; # per domain
    keys_expire = 7d;   # expire date for redis
# bcc_addrs = [ "postmas...@bbmk.org" ];
}

no_reporting_domains = "/etc/rspamd/local.d/dmarc_no_reporting_domains.txt";
***

(obviously, org_name, domain, email and from_name should be adapted
accordingly..)


And I'll be hanging onto this for reference. So far I have not found DMARC reporting very useful to me except to confirm that a couple of moderately large Boston-area remailers consistently throw my DMARC on the floor. :p


--
  Phil Stracchino
  Babylon Communications
  ph...@caerllewys.net
  p...@co.ordinate.org
  Landline: +1.603.293.8485
  Mobile:   +1.603.998.6958

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