middle.network
Health check

SPF, DKIM, DMARC, BIMI and MTA-STS checkers

Email authentication proves your messages really come from you. Get it right and you land in the inbox; get it wrong and you land in spam, or someone sends as you.

8
tools
8
live now
8 tools
No tool matches. Try “dns”, “mail” or “ping”, or see every tool.
SPF check Validate SPF and count the 10 DNS lookups. Live lookup
DKIM check Find DKIM keys and check their strength. Live lookup
DMARC check Read the DMARC policy and reporting setup. Live lookup
BIMI check Check your brand logo record for inboxes. Live lookup
MTA-STS check Check encryption is enforced for incoming mail. Live lookup
TLS-RPT check Check you get reports when secure delivery fails. Live lookup
DANE / TLSABeta Check TLSA records for your mail servers. Live lookup
SPF / DMARC / DKIM / BIMI generators Build SPF, DMARC, DKIM, BIMI and MTA-STS records. Instant

Common questions

Check and generate SPF, DKIM, DMARC, BIMI, MTA-STS, TLS-RPT and DANE records so your email is trusted and can’t be spoofed.

Yes. Gmail, Yahoo and Outlook require all three for bulk senders, and they protect everyone else from spoofing.

Start with p=none and reports turned on, fix any failures you see, then move to quarantine and finally reject.