Email Validator
A valid email address follows RFC 5322 format: local@domain.tld. The local part (1-64 chars) allows letters, digits, dots, hyphens, and special characters but cannot start/end with a dot or contain consecutive dots. The domain must include a valid TLD (2+ chars). Common issues: disposable providers (mailinator.com), role addresses (admin@, info@), and typos (gmial.com). Format validation checks syntax only; SMTP verification is needed to confirm deliverability.
Validate email addresses for correct format, detect disposable providers, role-based addresses, and common typos. Batch validation for multiple emails. RFC 5322 format checking with detailed error reporting.
Email Input
How to Use
- 1
Enter email addresses
Type or paste one or more email addresses. Separate multiple emails with commas, semicolons, or newlines for batch validation.
- 2
Click Validate
The validator checks RFC 5322 format, local part rules, domain structure, and TLD validity. It also scans for disposable providers, role addresses, and common typos.
- 3
Review results
Each email shows a pass/fail status with detailed checks. Green means valid, red means invalid, yellow means valid with warnings (disposable, role-based, or typo detected).
- 4
Copy or fix
Copy the validation results to share. If typos are detected, the tool suggests corrections (e.g., gmial.com to gmail.com).
Frequently Asked Questions
- How do I validate an email address format?
- A valid email address follows the format local@domain.tld. The local part (before @) can be 1-64 characters containing letters, digits, dots, hyphens, and special characters. It cannot start or end with a dot or contain consecutive dots. The domain must have at least two parts separated by dots, with a TLD of 2+ characters. Example: user.name@example.com is valid; user..name@.com is not.
- What is a disposable email address?
- A disposable (or temporary) email address is a throwaway inbox from services like Mailinator, Guerrilla Mail, or TempMail. Users create them to avoid spam when signing up for services. They typically expire after hours or days. Businesses often block disposable emails in registration forms because they indicate low-intent users who may never return.
- What is a role-based email address?
- A role-based email address uses a generic function name instead of a personal name as the local part. Examples: admin@, info@, support@, sales@, postmaster@, abuse@. These addresses typically go to a team rather than an individual. Marketing emails sent to role addresses often have lower engagement rates and higher complaint rates.
- What is RFC 5322 email format?
- RFC 5322 defines the Internet Message Format standard for email addresses. It specifies that the local part can contain ASCII letters, digits, and special characters (.!#$%&*+/=?^_`{|}~-). The domain must be a valid hostname. Quoted strings in the local part allow spaces and other special characters, though this is rarely used in practice.
- Can email validation confirm an email exists?
- Format validation only checks if the email follows the correct syntax rules. It cannot confirm whether the mailbox actually exists or can receive mail. To verify deliverability, you need an SMTP check (connecting to the mail server) or a verification API service. This tool validates format, detects disposable providers, and catches common typos.
- What are common email address typos?
- The most common email typos involve domain misspellings: gmial.com instead of gmail.com, hotmal.com instead of hotmail.com, outlok.com instead of outlook.com, and yahooo.com instead of yahoo.com. Missing or extra letters in the TLD are also frequent: gmail.co instead of gmail.com. This validator detects 15+ common domain typos automatically.
Email Address Format Rules (RFC 5322)
| Part | Rule | Example | Notes |
|---|---|---|---|
| Local part | 1-64 characters | user.name | Letters, digits, dots, special chars |
| @ separator | Exactly one @ | @ | Divides local from domain |
| Domain | 3-253 characters | example.com | Valid hostname format |
| TLD | 2+ characters | .com, .co.uk | Must exist in DNS |
| No consecutive dots | Applies to local part | user..name is invalid | Single dots only |
| No edge dots | Local part only | .user@ is invalid | Cannot start/end with dot |