Fake Email Checker
Instantly detect disposable, temporary, and free webmail addresses. Know whether an email is a real business contact before you reach out.
Known temporary/throwaway domain.
Personal inbox (Gmail, Yahoo, etc).
Custom domain — likely real contact.
Why Fake Emails Hurt Your Outreach
Disposable and fake email addresses pollute your CRM, waste outreach credits, inflate bounce rates, and damage your sender reputation. For B2B SaaS companies, filtering out disposable emails at sign-up also prevents free-trial abuse, reduces fraudulent account creation, and ensures your analytics reflect real business intent.
Disposable vs Free Webmail vs Business Email
Disposable emails are intentionally ephemeral — services like Mailinator, TempMail, and Guerrilla Mail provide inboxes that expire after minutes or hours with no authentication required to read them.
Free webmail (Gmail, Yahoo, Outlook, ProtonMail) is a permanent personal inbox. These may belong to real people, but are not business contacts. In a B2B context, a Gmail address signals a personal account rather than a company decision-maker.
Business domains use custom email addresses on company-owned domains — the highest-quality contacts for B2B outreach.
How to Prevent Fake Email Signups
Validate emails in real time at point of entry. At minimum, check syntax validity, domain existence, MX record presence, and disposable domain list membership. FareOf's email verifier handles all of these in a single API call.
Frequently Asked Questions
Should I block free webmail from my forms?
For B2B, blocking free webmail ensures business-quality leads. For consumer products, it would exclude many legitimate users. Use it as a scoring factor rather than a hard block.
Can someone use a real domain to fake an email?
Yes — a domain can be real but the specific mailbox may not exist. This tool checks domain category only. For full mailbox verification including SMTP reachability, use the complete email verifier.