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add suppression list for outgoing dmarc and tls reports

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for reporting addresses that cause DSNs to be returned. that just adds noise.
the admin can add/remove/extend addresses through the webadmin.

in the future, we could send reports with a smtp mail from of
"postmaster+<signed-encoded-recipient>@...", and add the reporting recipient
on the suppression list automatically when a DSN comes in on that address, but
for now this will probably do.
This commit is contained in:
Mechiel Lukkien
2023-11-13 13:48:52 +01:00
parent 6ce69d5425
commit e24e1bee19
12 changed files with 697 additions and 17 deletions
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15
tlsrptsend/send.go
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@ -441,6 +441,19 @@ Period: %s - %s UTC
msgSize := int64(len(msgPrefix)) + msgInfo.Size()
for _, rcpt := range recipients {
// If recipient is on suppression list, we won't queue the reporting message.
q := bstore.QueryDB[tlsrptdb.TLSRPTSuppressAddress](ctx, db)
q.FilterNonzero(tlsrptdb.TLSRPTSuppressAddress{ReportingAddress: rcpt.Address.Path().String()})
q.FilterGreater("Until", time.Now())
exists, err := q.Exists()
if err != nil {
return false, fmt.Errorf("querying suppress list: %v", err)
}
if exists {
log.Info("suppressing outgoing tls report", mlog.Field("reportingaddress", rcpt.Address))
continue
}
qm := queue.MakeMsg(mox.Conf.Static.Postmaster.Account, from.Path(), rcpt.Address.Path(), has8bit, smtputf8, msgSize, messageID, []byte(msgPrefix), nil)
// Don't try as long as regular deliveries, and stop before we would send the
// delayed DSN. Though we also won't send that due to IsTLSReport.
@ -451,7 +464,7 @@ Period: %s - %s UTC
no := false
qm.RequireTLS = &no
err := queueAdd(ctx, log, &qm, msgf)
err = queueAdd(ctx, log, &qm, msgf)
if err != nil {
tempError = true
log.Errorx("queueing message with tls report", err)