Is u108265739.ct.sendgrid.net safe?
http://u108265739.ct.sendgrid.net/
Coveragecomplete3 of 4 applicable core capabilities
SendGrid tracking subdomain abused in Microsoft 365 phishing chain
u108265739.ct.sendgrid.net is a legitimate SendGrid click-tracking subdomain that was observed as the first hop in a multi-stage redirect chain leading to a fake Microsoft 365 login page. The specific tracking link is now returning a 404 error, indicating the campaign has ended, but the domain remains a known vector for credential-harvesting attacks.
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Where this site sits
- Dangerous1–20
- High Risk21–44
- Moderate Risk45–69
- Low Risk70–84
- Safe85–100
The score combines saved evidence strength and analysis quality. Coverage is reported separately.
01 · Investigation Brief
Investigation Brief
u108265739.ct.sendgrid.net is a legitimate SendGrid click-tracking subdomain that was observed as the first hop in a multi-stage redirect chain leading to a fake Microsoft 365 login page. The specific tracking link is now returning a 404 error, indicating the campaign has ended, but the domain remains a known vector for credential-harvesting attacks.
Observed redirect path
Security researchers documented the subdomain routing visitors through mauthcopilot.com and then to a fake Microsoft 365 sign-in page hosted on portalmyadminsigninapps.experiencewithreliability.de.
Current availability
The URL now returns a 404 Not Found response, showing the specific tracking link or campaign path is no longer active.
Why the score is 25
Documented use as first hop in AITM phishing campaign targeting Microsoft 365 credentials. Coverage remains separate so missing sources cannot be mistaken for clean results.
02 · Security Evidence
Security evidence
Antivirus Engines
0/ 92
No detectionsFresh result
No detections across 92 engines
No antivirus engine in this saved scan raised an adverse result. This is one signal, not a guarantee.
- Malicious
- 0
- Suspicious
- 0
- Total
- 92
All 92 engine results
- 0xSI_f33d - unrated - Clean
- Abusix - clean - Clean
- Acronis - clean - Clean
- ADMINUSLabs - clean - Clean
- AILabs (MONITORAPP) - clean - Clean
- AlienVault - clean - Clean
- alphaMountain.ai - clean - Clean
- AlphaSOC - clean - Clean
- Antiy-AVL - clean - Clean
- ArcSight Threat Intelligence - unrated - Clean
- AutoShun - unrated - Clean
- Bfore.Ai PreCrime - unrated - Clean
- BitDefender - clean - Clean
- Bkav - unrated - Clean
- BlockList - clean - Clean
- Blueliv - clean - Clean
- Certego - clean - Clean
- ChainPatrol - unrated - Clean
- Chong Lua Dao - clean - Clean
- CINS Army - clean - Clean
- Cluster25 - unrated - Clean
- CRDF - clean - Clean
- Criminal IP - unrated - Clean
- CSIS Security Group - unrated - Clean
- CTX AI - clean - Clean
- Cyan - unrated - Clean
- Cyble - clean - Clean
- CyRadar - clean - Clean
- desenmascara.me - clean - Clean
- DNS8 - unrated - Clean
- Dr.Web - clean - Clean
- EmergingThreats - clean - Clean
- Emsisoft - clean - Clean
- Ermes - unrated - Clean
- ESET - clean - Clean
- ESTsecurity - clean - Clean
- Forcepoint ThreatSeeker - clean - Clean
- Fortinet - clean - Clean
- Fortra - unrated - Clean
- G-Data - clean - Clean
- GCP Abuse Intelligence - unrated - Clean
- Google Safe Browsing - clean - Clean
- GreenSnow - clean - Clean
- GreyNoise - unrated - Clean
- Gridinsoft - unrated - Clean
- Guardpot - unrated - Clean
- Heimdal Security - clean - Clean
- Hunt.io Intelligence - unrated - Clean
- IPsum - clean - Clean
- Juniper Networks - clean - Clean
- K7AntiVirus - unrated - Clean
- Kaspersky - unrated - Clean
- LevelBlue - clean - Clean
- Lionic - clean - Clean
- Lumu - unrated - Clean
- Malwared - clean - Clean
- MalwarePatrol - clean - Clean
- MalwareURL - unrated - Clean
- Mimecast - unrated - Clean
- Netcraft - unrated - Clean
- OpenPhish - clean - Clean
- PhishFort - unrated - Clean
- Phishing Database - clean - Clean
- Phishtank - clean - Clean
- PREBYTES - clean - Clean
- PrecisionSec - unrated - Clean
- Quick Heal - clean - Clean
- Quttera - clean - Clean
- Rising - clean - Clean
- SafeToOpen - unrated - Clean
- Sangfor - clean - Clean
- Sansec eComscan - unrated - Clean
- Scantitan - clean - Clean
- SCUMWARE.org - clean - Clean
- Seclookup - clean - Clean
- Snort IP sample list - unrated - Clean
- SOCRadar - unrated - Clean
- Sophos - clean - Clean
- StopForumSpam - clean - Clean
- Sucuri SiteCheck - clean - Clean
- ThreatHive - clean - Clean
- URLhaus - clean - Clean
- URLQuery - unrated - Clean
- Viettel Threat Intelligence - clean - Clean
- VIPRE - unrated - Clean
- ViriBack - clean - Clean
- VX Vault - clean - Clean
- Webroot - clean - Clean
- Xcitium Verdict Cloud - unrated - Clean
- Yandex Safebrowsing - clean - Clean
- ZeroCERT - clean - Clean
- ZeroFox - unrated - Clean
Security Scans
Checked against the browser threat feeds available to this scan — no hit.
What we observed
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Visual context from the captured page
404 Not Found
What the captured page showed
1 observation- 01
404 Not Found
03 · Investigation Story
Investigation story
What the site claims
No page claim could be verified for u108265739.ct.sendgrid.net because no usable page content or saved capture was available.
What we observed
Saved browser evidence recorded cross domain landing.
What independent research found
2 external findings were saved and compared with the page evidence.
What remains unverified
1 of the 4 applicable core capabilities did not complete, so those gaps remain visible in the coverage ledger.
What kind of site and risk is this?
Threat category
Phishing & Impersonation
Service and business model
Unknown
Observed behavior
Evidence behind this classification
- 01Documented use as first hop in AITM phishing campaign targeting Microsoft 365 credentials
Web research findings
Independent findings for u108265739.ct.sendgrid.net, including public complaints, named review sources, registration records, and look-alike-domain evidence. A missing result is shown as unverified, never converted into a clean bill of health.
- TrendAI Securityopen
"u108265739[.]ct[.]sendgrid[.]net → mauthcopilot[.]com → portalmyadminsigninapps.experiencewithreliability[.]de/0xrcY/ → fake Microsoft 365 sign-in page"
Reputation Sources
How this domain rates across independent threat-intelligence and blocklist providers.
04 · Domain & Infrastructure
Domain & infrastructure
The plumbing behind the site — who registered it, how it’s encrypted, where it’s hosted, and where it links out. A valid certificate or a calm server doesn’t mean the business is honest — scam sites pass these checks too. Use this to corroborate the verdict, not to overturn it.
Infrastructure map
How the saved page connected to the wider web.
- Domainu108265739.ct.sendgrid.net
- Redirects tou108265739.ct.sendgrid.net
- Hosted byAmazon Data Services Northern Virginia
Domain Timeline
- Apr 20, 2009Domain registered
First appeared in WHOIS records — 17 years old today.
- Aug 24, 2026Saved security review — Flagged as suspicious
The completed checks from this saved scan are detailed above.
u108265739.ct.sendgrid.net is an established domain now carrying threat signals. An older domain that starts tripping security checks is a classic pattern for an asset that was sold, repurposed, or compromised — the age alone is not reassurance.
Domain & Encryption
Server Reputation
05 · Evidence Ledger
Evidence ledger
- Antiviruscomplete
- Browser threat feedcomplete
- Page contentpartial
- Analysiscomplete
- Visual evidencecomplete
The conclusion is supported by the evidence saved with this report.
Technical threat
unknownMalware, phishing, credential theft and hostile infrastructure.
No confirmed evidence in this dimension.
Operator / customer risk
suspiciousComplaints, withdrawals, business conduct and commercial traps.
Additional evidence review
Source coverage and freshness
Status shows whether usable evidence was saved; finding shows what that evidence observed.
| Source | Result | Completion | Finding | Freshness |
|---|---|---|---|---|
| Antivirus | 0 of 92 engines flagged | Completed | No adverse finding | fresh · Aug 24, 2026 |
| Browser protection | No browser threat-list match | Completed | No adverse finding | Not available |
| Page content | Page content was not available for semantic review | Limited | No saved finding | Not available |
| Visual evidence | 1 visible observation saved with the page capture | Completed | No adverse finding | Not available |
| Independent research | 2 independent findings were saved | Completed | Adverse | Not available |
- Antivirus
- Result0 of 92 engines flagged
- CompletionCompleted
- FindingNo adverse finding
- Freshnessfresh · Aug 24, 2026
- Browser protection
- ResultNo browser threat-list match
- CompletionCompleted
- FindingNo adverse finding
- FreshnessNot available
- Page content
- ResultPage content was not available for semantic review
- CompletionLimited
- FindingNo saved finding
- FreshnessNot available
- Visual evidence
- Result1 visible observation saved with the page capture
- CompletionCompleted
- FindingNo adverse finding
- FreshnessNot available
- Independent research
- Result2 independent findings were saved
- CompletionCompleted
- FindingAdverse
- FreshnessNot available
07 · Safety FAQ
Safety FAQ
Common questions, answered directly from the scan data above — so the answers reflect the saved verdict and evidence in this report.
Is u108265739.ct.sendgrid.net a scam or a legit website?
Is u108265739.ct.sendgrid.net safe to use?
What should I do if I already gave my details to u108265739.ct.sendgrid.net?
Can I get my money back from u108265739.ct.sendgrid.net?
Did u108265739.ct.sendgrid.net steal my password or personal information?
How do I report u108265739.ct.sendgrid.net?
Why does u108265739.ct.sendgrid.net look legitimate if it's a scam?
Has u108265739.ct.sendgrid.net been flagged by antivirus engines?
Is u108265739.ct.sendgrid.net on any phishing or malware blacklists?
How old is the u108265739.ct.sendgrid.net domain?
Does u108265739.ct.sendgrid.net have a valid SSL certificate?
How often is the u108265739.ct.sendgrid.net report updated?
08 · Final Verdict
Final verdict
SendGrid tracking subdomain abused in Microsoft 365 phishing chain
u108265739.ct.sendgrid.net is a legitimate SendGrid click-tracking subdomain that was observed as the first hop in a multi-stage redirect chain leading to a fake Microsoft 365 login page. The specific tracking link is now returning a 404 error, indicating the campaign has ended, but the domain remains a known vector for credential-harvesting attacks.
09 · Community
