Email Validation
Email validation tools and API
Free email tools for quick, one-off checks, plus a real-time API for teams that need validation at scale. Each tool checks an address for syntax, deliverability, disposable domains, catch-all behavior, and more.
Free email tools
Run a quick check on any address without an account or API key.
Email Verifier
Check syntax, MX records, SMTP deliverability, and disposable domain status for any email address.
Open toolEmail Syntax Checker
Validate that an email address follows RFC 5322 formatting rules before it touches your system.
Open toolEmail Existence Checker
Probe the destination mail server to confirm whether a specific mailbox actually exists.
Open toolCatch-All Email Checker
Detect whether a domain accepts mail for every address, which makes SMTP probing unreliable.
Open toolTemporary Email Checker
Find out if an address belongs to a throwaway inbox service like Mailinator or Temp-Mail.
Open toolDomain Age Checker
Look up when a domain was first registered to spot newly minted addresses used in fraud.
Open toolAPI and developers
Integrate email validation directly into your product or workflow.
Email Verification API
Validate any email address for syntax, deliverability, disposable domains, catch-all behavior, and more in one call.
Open toolDisposable Emails
Browse the database of disposable and throwaway email domains that Trueguard flags automatically.
Open toolTemporary Email Sending
Learn how temporary email senders operate and how Trueguard detects them at signup.
Open toolAPI Documentation
Full reference for the email validation API: endpoints, parameters, response fields, and code samples.
Open toolIntegrations and guides
Call the email validation API from your language or stack, with working code.
Email Verification API
Need validation at scale?
The free tools above handle one address at a time. The API handles thousands. One endpoint, nine code samples, 100 free validations a month with no credit card required.
Get your free API key