Running diagnostic
Running your DNS diagnostic…
Checking SPF, DMARC, DKIM, MX, DNS, blacklists and domain & SSL expiry. A domain we haven't scanned before takes a few seconds — hang tight.
Checking SPF, DMARC, DKIM, MX, DNS, blacklists and domain & SSL expiry. A domain we haven't scanned before takes a few seconds — hang tight.
Scanned Jul 21, 2026 08:22 UTC · 7 checks · public report
One finding blocks deliverability.
rocket.chat publishes an enforcing DMARC policy, so mail that forges its domain is quarantined or rejected at the recipient.
Your email sender check is failing because the SPF setup relies on too many nested lookups, which goes over the DNS limit. This matters because receiving mail servers may stop checking it properly, which can make your messages more likely to be rejected or marked as suspicious. The fix is to simplify the SPF setup by reducing the number of included services, often by removing unneeded senders or flattening the lookup chain.
v=spf1 include:_spf.google.com include:amazonses.com include:zoho.com include:8859759.spf10.hubspotemail.net include:sendgrid.net include:spf.mailserviceconnect.email mx -allEdit your SPF record at Amazon Route 53 — step-by-step guide.
Your email authentication is using a DKIM key that is too short, which makes it weaker than recommended. This matters because weaker keys are easier to break, so email spoofing and tampering are harder to defend against. The fix is to replace that DKIM key with a stronger, longer key and update the DKIM setup for the affected selector.
One send: the full report — every finding and fix — lands in your inbox, with a free account waiting. Opening it signs you in and starts a 14-day Monitor trial. No card, and you can unsubscribe in one click.
Domain owner? Re-scan any time — or email [email protected] to have this page removed.