DomailfixEmail syntax checker
Paste one address, or many with one per line. Each is checked against the rules for how an email address must be written, with a plain explanation of anything wrong and a fix for common typos. Nothing is sent anywhere: the check runs in your browser.
Questions and answers
What makes an email address valid?
A name part (up to 64 characters), one @, and a domain such as company.com. The name part may use letters, digits and a few symbols such as . _ - +, but not two dots in a row or a dot at the start or end.
Does correct syntax mean the address exists?
No. An address can be written perfectly and still not exist. Use the email verifier to check that the mailbox is real before you send.
What is plus addressing?
Many providers deliver jane+news@company.com to jane@company.com. It is valid and often used to sort email.
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