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Results for

bt.com

Email authentication

The basics are in place but can be hardened.

  • 3Pass
  • 1Warning
  • 0Fail
  • 2Not set

SPF

Pass

Authorizes which servers may send mail for the domain

SPF is published and within limits.

Policy
~all
DNS lookups
3 / 10
  • Ends in ~all (softfail): unauthorized senders are marked, not rejected.
  • Uses 3 of 10 allowed DNS lookups.
v=spf1 include:spf.protection.outlook.com include:www.thrs.bt.com include:smtp1.bt.com ip4:62.7.242.136/29 ip4:62.239.224.234/31 ip4:62.239.224.236/31 ip4:62.239.224.98/31 ip4:193.113.108.40/31 ip4:212.140.59.179 ip4:212.140.56.164 ip4:212.49.128.65 ip4:200.47.123.3 ip4:147.149.196.177 ip4:147.149.100.81 ip4:147.149.196.181 ip4:147.149.100.78 ~all

DKIM

Pass

Cryptographically signs outgoing mail (best-effort selector probe)

DKIM key published for 3 known selectors.

Selectors
selector1, s1, s2
  • Found a DKIM key at selector1._domainkey.bt.com
  • Found a DKIM key at s1._domainkey.bt.com
  • Found a DKIM key at s2._domainkey.bt.com

DMARC

Pass

Tells receivers what to do with mail that fails SPF and DKIM

DMARC is enforced.

Policy
p=reject
Coverage
100%
  • Policy p=reject: failing mail is rejected outright.
  • Aggregate reports (rua) are configured.
v=DMARC1; p=reject; fo=1; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected]

MTA-STS

Warning

Enforces TLS for inbound mail and prevents downgrade attacks

MTA-STS is published but not enforcing.

Mode
testing
Max age
86400s
  • Policy mode is testing: failures are reported but mail is still delivered.
v=STSv1; id=20250710

TLS-RPT

Not set

Receives reports about TLS delivery failures

No TLS-RPT record. You get no reports about failed TLS delivery.

BIMI

Not set

Displays your verified brand logo in supporting inboxes

No BIMI record. No brand logo is published for inboxes.

Checks query live DNS over Cloudflare and the public MTA-STS policy endpoint. DKIM selectors cannot be listed from DNS, so DKIM detection probes common provider selectors only.