~/d/slack.com
// slack.com
Live audit across 8 checks. Cached 24h · generated less than a minute ago.
domain_grade
A+
excellent
95
/ 100 · across 8 checks
// points lost on:
security headers −5
SSL Certificate
[ OK ]
Valid for 72 more days.
Issued by R13 · 72 days left · TLSv1.3
DMARC Policy
[ OK ]
Strict DMARC policy enforced. Spoofed mail is rejected.
v=DMARC1;p=reject;fo=1:d:s;pct=100;rua=mailto:[email protected],mailto:[email protected];ruf=mailto:[email protected]
SPF Record
[ OK ]
Strict SPF (-all). Unauthorized senders are rejected.
3 lookups · all=-all
MX Records
[ OK ]
MX configured. Detected provider: Google Workspace.
1 aspmx.l.google.com · 5 alt2.aspmx.l.google.com · 5 alt1.aspmx.l.google.com
Name Servers
[ OK ]
4 authoritative nameservers
ns-1493.awsdns-58.org · ns-166.awsdns-20.com · ns-1901.awsdns-45.co.uk
WHOIS
[ OK ]
Valid for 547 more days.
Registrar: MarkMonitor Inc. · expires 2027-10-20
Security Headers
[ WARN ]
Below average (45/100) — missing: CSP, X-Content-Type-Options, Permissions-Policy
Score 45/100
[ embed_grade_badge ]
Domain grade: A+ — excellent
markdown (github readme)
[](https://dombrains.com/d/slack.com)
html (any webpage)
<a href="https://dombrains.com/d/slack.com"><img src="https://dombrains.com/badge/slack.com/grade.svg" alt="DomBrains grade: A+"></a>
// re-queries our scoring engine · cached 1h at the edge · backlinks to this profile page
[ per_check_badges ]
<img src="https://dombrains.com/badge/slack.com/ssl">
<img src="https://dombrains.com/badge/slack.com/dmarc">
<img src="https://dombrains.com/badge/slack.com/spf">
<img src="https://dombrains.com/badge/slack.com/mx">
<img src="https://dombrains.com/badge/slack.com/dnssec">
<img src="https://dombrains.com/badge/slack.com/security_headers">