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implement outgoing dmarc aggregate reporting

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in smtpserver, we store dmarc evaluations (under the right conditions).
in dmarcdb, we periodically (hourly) send dmarc reports if there are
evaluations. for failed deliveries, we deliver the dsn quietly to a submailbox
of the postmaster mailbox.

this is on by default, but can be disabled in mox.conf.
This commit is contained in:
Mechiel Lukkien
2023-11-01 17:55:40 +01:00
parent d1e93020d8
commit e7699708ef
40 changed files with 2689 additions and 245 deletions
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8
main.go
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@ -2436,13 +2436,13 @@ address must opt-in to receiving DMARC reports by creating a DMARC record at
return
}
accepts, status, _, txt, authentic, err := dmarc.LookupExternalReportsAccepted(context.Background(), dns.StrictResolver{}, domain, destdom)
accepts, status, _, txts, authentic, err := dmarc.LookupExternalReportsAccepted(context.Background(), dns.StrictResolver{}, domain, destdom)
var txtstr string
txtaddr := fmt.Sprintf("%s._report._dmarc.%s", domain.ASCII, destdom.ASCII)
if txt == "" {
txtstr = fmt.Sprintf(" (no txt record %s)", txtaddr)
if len(txts) == 0 {
txtstr = fmt.Sprintf(" (no txt records %s)", txtaddr)
} else {
txtstr = fmt.Sprintf(" (txt record %s: %q)", txtaddr, txt)
txtstr = fmt.Sprintf(" (txt record %s: %q)", txtaddr, txts)
}
if status != dmarc.StatusNone {
printResult("fail: %s%s", err, txtstr)