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www.mayoclinic.com
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www.mayoclinic.com
Is www.mayoclinic.com Safe? Security Score 89.6/100 | CyStack
www.mayoclinic.com
Web site unavailable
Learn more about services at Mayo Clinic.
Industry
Health
Origin
United States
Global rank
#154,276
Rank in United States
#42,262
Updated at
B89.6/100
Security level
Good
Data confidence
High
Scope checked
100%
The higher the score, the more externally observable protections the system has recorded. This page does not certify that the website is reputable, legitimate, or completely free of vulnerabilities.
Is the website “www.mayoclinic.com” safe?
As of August 30, 2026 at 05:03, www.mayoclinic.com has a security score of 89.6/100 (grade B – “Good”). CyStack’s automated assessment recorded 8 issues to review after completing 100% of applicable checks. The website owner should address “DMARC blocking policy” first, then review the remaining items in order of impact.
Does www.mayoclinic.com show known scam, phishing, or malware signals?
At assessment time, CyStack did not find www.mayoclinic.com or related infrastructure on any scam, phishing, or malware warning list after checking 5 online reputation sources. This result reflects external observations; it does not guarantee absolute safety or verify the organization’s legal status or reputation.
Potentially exposed domain email addressesChecks infostealer data for email addresses ending in @mayoclinic.com, the registered domain of the assessed website www.mayoclinic.com. A record is not counted merely because someone visited or signed in to the website.10 Matching email exposure records
10Matching email exposure records
5Related infected devices (estimated)
These matching email records were observed previously, but they may already have been addressed or may no longer be valid. The device count estimates infected devices associated with these email records; it is not the number of devices owned by the organization.
Frequently asked questions
What affects the security of www.mayoclinic.com?
A valid SSL certificate still does not prove that www.mayoclinic.com is safe, legitimate, or free of scam signals. For a more complete assessment, this report also checks phishing and malware, exposed email records, IPs and open ports, subdomains, technologies, and CVEs that may apply to observed versions.
Does www.mayoclinic.com use HTTPS, and is its SSL certificate valid?
www.mayoclinic.com used a valid SSL certificate at assessment time, valid until February 4, 2027. This status may change when the certificate expires or the server configuration changes.
Have @mayoclinic.com email addresses appeared in exposed data or information-stealer (infostealer) logs?
Data sources
Data compiled from CyStack cybersecurity monitoring systems
CyStack compiles scan results from its internal cybersecurity monitoring systems, including CyStack VulnScan and CyStack Threat Intelligence, together with publicly available Internet data. The assessment only observes and analyzes information already available; it does not attempt unauthorized access, test passwords, send exploit code, or change or disrupt the assessed system.
These 3 failed checks or warnings have the greatest impact on the result for www.mayoclinic.com.
DMARC blocking policyThe effective DMARC policy is none and applies to 100% of messages.High
Why it matters
A policy of quarantine or reject tells receiving services to move suspicious mail to spam or refuse it. A monitoring-only policy (p=none) records the problem but does not ask receivers to stop spoofed mail.
What to do
After every legitimate sender passes DMARC, move gradually to quarantine and then reject, covering 100% of messages.
HSTS availabilityThe HTTPS response does not contain an effective HSTS policy.Medium
Why it matters
HTTP Strict Transport Security (HSTS) tells a browser to use HTTPS automatically on future visits. This reduces the chance that a visitor is downgraded to an unencrypted connection.
What to do
After confirming that every required page works over HTTPS, send the Strict-Transport-Security header on all HTTPS responses.
Scope of this check
Authorized email senders (SPF)No SPF record was found for the registrable email domain.Medium
Why it matters
Sender Policy Framework (SPF) lists the systems allowed to send email for the domain. Without it, receiving services have less evidence to distinguish legitimate mail from spoofed mail.
What to do
Publish one SPF TXT record that includes every legitimate email service and no unauthorized sender.
Evidence and check scope
Leak evidenceMost recent observation:
Email addressRelated infected deviceInfection evidenceRecorded time
Email addressC**************@mayoclinic.comRelated infected deviceNo safely shareable device details are available for this record.IOC reference: IOC-EADCE4F086Infection evidenceStealCRecorded timeEmail addressS*******@mayoclinic.comRelated infected deviceD************** (Windows 11 x64)BrazilIOC reference: IOC-6D32B89F9CInfection evidenceAcreedRecorded timeEmail addressB************@mayoclinic.comRelated infected deviceNo safely shareable device details are available for this record.IOC reference: IOC-6DCEF8D90DInfection evidenceStealCRecorded timeEmail addressS*********************@mayoclinic.comRelated infected deviceNo safely shareable device details are available for this record.United StatesIOC reference: IOC-96406A8495Infection evidenceCSBradmaxCookiesOnlyStealerRecorded timeEmail addressD*************@mayoclinic.comRelated infected deviceNo safely shareable device details are available for this record.IOC reference: IOC-EADCE4F086Infection evidenceStealCRecorded timeEmail addressY*********@mayoclinic.comRelated infected deviceNo safely shareable device details are available for this record.IOC reference: IOC-EADCE4F086Infection evidenceStealCRecorded timeEmail addressC******@mayoclinic.comRelated infected deviceNo safely shareable device details are available for this record.IOC reference: IOC-EADCE4F086Infection evidenceStealCRecorded timeEmail addressM************@mayoclinic.comRelated infected deviceNo safely shareable device details are available for this record.IOC reference: IOC-EADCE4F086Infection evidenceStealCRecorded timeEmail addressW********@mayoclinic.comRelated infected deviceNo safely shareable device details are available for this record.IOC reference: IOC-EADCE4F086Infection evidenceStealCRecorded timeEmail addressg*********@mayoclinic.comRelated infected deviceD************** (Windows 10 Pro (10.0.19045) x64)IndonesiaIOC reference: IOC-3CA3E5D5C8Infection evidenceLummaObserved application: Chrome Profile 1 (131.0.6778.205)
Discovered subdomains (77+)Subdomains of mayoclinic.com, the registered domain of the assessed website www.mayoclinic.com. Sensitive-looking names are shown first; individual subdomains have not been separately security-tested.Partial
admin.healthletter.mayoclinic.comSensitive-lookingAdmin system
admin.healthsource.mayoclinic.comSensitive-lookingAdmin system
Public web contextThe website title, description, industry and popularity.
Page title
Web site unavailable
Website category
Health
Description
Learn more about services at Mayo Clinic.
Global rank
#154,276
Rank in United States
#42,262
Rank in industry
#970
Final URL
https://www.mayoclinic.com/
Website rankings and industry category are based on data from Similarweb
This is a quick, point-in-time check from outside the organization. It can surface visible risks, but it does not replace penetration testing or an authenticated assessment.
There are currently 10 exposed email records matching the mayoclinic.com domain. These records may be old or already resolved. The website owner should verify them before resetting passwords or locking related accounts.
Which public IPs, services, and ports does www.mayoclinic.com expose?
The assessment observed 1 public IPs and 4 open ports for www.mayoclinic.com. An open port is not the same as a vulnerability, but the website owner should keep every public service updated and appropriately restrict access.
How many subdomains of mayoclinic.com have been discovered?
The assessment observed 77+ public subdomains of mayoclinic.com. This list can reveal additional entry points such as APIs, administration systems, or test environments, but it does not mean that every subdomain is risky.
Industry
Updated at 
United States
