Postbox Free Tools
Postbox APRF Monitor · Inbox Placement · Free Beta

Free APRF Monitoring

DMARC tells you who is sending as your domain. APRF tells you where that mail actually lands - inbox or spam - and how people engage with it, reported straight from the mailbox provider. Add one DNS record and get it in a plain-English weekly digest.

Live beta - coverage is honest. APRF is a new IETF draft (draft-brotman). Right now the only provider sending these reports is Comcast / Xfinity, so today your digest covers Comcast-bound mail. As Gmail, Yahoo and others adopt APRF, your digest fills in automatically - nothing to change. You are setting up early, at the front of the line.

Get your reporting address

Enter your email, the domain your mail is signed with (your DKIM d= domain), and the DKIM selector. We generate a unique reporting address for you to add to your DNS.

No account. Nothing to log into. No password. Just a DNS record. No spam. We never email you until your DNS is verified.

What APRF is

APRF - Aggregate Performance Reporting - is an IETF draft that lets mailbox providers send senders a regular, aggregated report on how their mail performed: what share reached the inbox versus spam, and how recipients engaged with it. It is keyed to your DKIM signing domain and selector, the same way DMARC reporting is keyed to your domain, and it arrives as machine-readable JSON. This tool collects those reports for you and turns them into a plain-English weekly digest.

It is deliberately privacy-preserving: reports are aggregate-only, never per-recipient, and the draft recommends providers bucket the numbers (round them into bands) so no individual mailbox can be inferred. We store and present the figures exactly as the provider reports them - and never compute exact per-message rates from them.

How it works, in brief

  1. You publish one TXT record at <selector>._aprf._domainkey.<your-domain> that points reporting at the address we generate above.
  2. Participating mailbox providers read it and email an aggregate performance report for mail signed with that domain and selector.
  3. We collect those reports, and each week we send you a digest: inbox versus spam placement, and positive / neutral / negative engagement, with a plain-English read on what it means.

Already publish an APRF record? Do not add a second one at the same name - we will show you your existing record with our reporting address merged into its rua= list, so you end up with exactly one valid record.

Related free tools

Build and check your APRF record before you monitor:

Service limits

A few limits keep the service fast, reliable, and free:

  • Report attachments up to 5 MB compressed, and up to 3 per email.
  • Up to 500 reports per day per monitored token.
  • Report data is retained for 90 days; your weekly digest summarizes recent activity.
  • Values are stored exactly as the provider reports them (often bucketed into bands) - we never compute or imply exact per-message rates.
  • Coverage today is Comcast / Xfinity; other providers are added automatically as they adopt APRF.
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