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implement accepting dmarc & tls reports for other domains

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to accept reports for another domain, first add that domain to the config,
leaving all options empty except DMARC/TLSRPT in which you configure a Domain.

the suggested DNS DMARC/TLSRPT records will show the email address with
configured domain. for DMARC, the dnscheck functionality will verify that the
destination domain has opted in to receiving reports.

there is a new command-line subcommand "mox dmarc checkreportaddrs" that
verifies if dmarc reporting destination addresses have opted in to received
reports.

this also changes the suggested dns records (in quickstart, and through admin
pages and cli subcommand) to take into account whether DMARC and TLSRPT is
configured, and with which localpart/domain (previously it always printed
records as if reporting was enabled for the domain). and when generating the
suggested DNS records, the dmarc.Record and tlsrpt.Record code is used, with
proper uri-escaping.
This commit is contained in:
Mechiel Lukkien
2023-08-23 14:27:21 +02:00
parent 9e248860ee
commit aebfd78a9f
13 changed files with 332 additions and 48 deletions
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@ -57,6 +57,7 @@ low-maintenance self-hosted email.
mox dmarc lookup domain
mox dmarc parsereportmsg message ...
mox dmarc verify remoteip mailfromaddress helodomain < message
mox dmarc checkreportaddrs domain
mox dnsbl check zone ip
mox dnsbl checkhealth zone
mox mtasts lookup domain
@ -665,6 +666,18 @@ can be found in message headers.
usage: mox dmarc verify remoteip mailfromaddress helodomain < message
# mox dmarc checkreportaddrs
For each reporting address in the domain's DMARC record, check if it has opted into receiving reports (if needed).
A DMARC record can request reports about DMARC evaluations to be sent to an
email/http address. If the organizational domains of that of the DMARC record
and that of the report destination address do not match, the destination
address must opt-in to receiving DMARC reports by creating a DMARC record at
<dmarcdomain>._report._dmarc.<reportdestdomain>.
usage: mox dmarc checkreportaddrs domain
# mox dnsbl check
Test if IP is in the DNS blocklist of the zone, e.g. bl.spamcop.net.