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slack.com

90/100
A

Scanned 2026-05-14

Cached result — add ?fresh=1 to force a new scan

Subcheck breakdown

CheckStatusScore
DMARC policyreject25/25
SPF recordok10/10
DKIM selectorfound10/10
TLS certificateok20/20
WHOIS integrityok10/10
Subdomain takeoverct logs busy10/15
MTA-STS / TLSRPTmissing0/5
DNSSECsigned5/5

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Details

AreaDetail
DMARCv=DMARC1;p=reject;fo=1:d:s;pct=100;rua=mailto:dmarc_agg@vali.email,mailto:0e5a5c34@inbox.ondmarc.com;ruf=mailto:0e5a5c34@inbox.ondmarc.com
SPFv=spf1 include:_spf.qualtrics.com include:mail.zendesk.com include:_spfextra.slack.com -all
DKIM selectorssmtpapi, mailo, zendesk1, zendesk2
TLS certificateOk (50 days remaining) — CN=R13,O=Let's Encrypt,C=US
WHOIS registrarMarkMonitor Inc.
WHOIS expires2027-10-20T04:00:00Z
SubdomainsCT logs temporarily unavailable — retry shortly
DNSSECSigned