Check if an email address looks legitimate before you reply.
Paste an email address or suspicious message to see whether the sender looks like a real person, a verified business, or a risky impersonation attempt.
Security Insight
Email-address checks made up more than 40% of a recent 1,000-row public scan sample, which makes sender verification one of the clearest recurring search and product intents.
When to use an email address checker
Most risky messages are not blocked because the inbox can only judge technical reputation. You still need a quick way to check the sender, the context, and the story the message is trying to sell.
A personal address is asking for money or urgency
A custom domain looks professional, but you do not know it
The display name looks familiar, but the mailbox does not
You need a fast sanity check before taking action
What IsThisSpam checks before you trust a sender
Quick verdicts are useful, but the real value is understanding why something looks safe, uncertain, or risky.
Free-email vs business-domain context
A free mailbox is not automatically malicious, but it should raise the bar when the sender claims to represent billing, support, hiring, compliance, or legal teams.
Domain age and reputation
New or lightly established domains deserve more caution than well-established domains with a clean reputation history.
Known-breach and identity clues
Some addresses show signs of being tied to real people, while others show no corroborating history at all. That distinction matters when context is thin.
Message intent, not just sender format
Urgency, payment pressure, credential requests, and fake support workflows matter just as much as the mailbox itself.
Related guides
Use the checker for the fast answer, then read the deeper guidance for recurring scam patterns.
How to Tell if a Gmail Address Is Legit
What 'Email Not Found in Breach Databases' Really Means
How to Verify a Business Email Domain Before You Reply
FAQ
These are the questions people usually ask right before they click, reply, or pay.
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Check the sender before you trust the message.
Start with a fast scan, then move to SuperScan when the message involves money, account access, or sensitive documents.