How it works

Verifalia is a web-based email validation service that lets you upload and validate lists of email addresses simply and easily.

Our unique email validation system cleans your lists by detecting invalid or non-working mailboxes, without disturbing your users: Verifalia validates email addresses without having to send out any emails, so there’s zero risk of your lists users receiving unsolicited email during the validation process.

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Join Verifalia today and start validating your email address lists. Signing up takes less than 30 seconds.



1Accurate email syntax validation

Verifalia features a complete syntactical email validation engine that obeys all relevant IETF standards, including: RFC 1123, RFC 2821, RFC 2822, RFC 3490, RFC 3696, RFC 4291, RFC 5321, RFC 5322 and RFC 5336.

It fully supports quoted strings, quoted pairs, internationalized domain names (IDN) and mailboxes, as well as comments and domain literals.

2Role account detection

Verifalia detects role accounts - that is, spammy addresses not belonging to a real person - and flags them; in fact, mailing to this type of address can have a significant impact on your deliverability, and/or result in blacklisting by certain ISPs.


3Domain / DNS check

Verifalia validates the DNS records for each email address being tested and flags addresses belonging to invalid, non-working and parked domains.

4Disposable address (DEA) detection

Verifalia detects temporary email addresses generated by certain free services on the Internet, collectively known as disposable email address providers, like Mailinator, 10MinuteMail, GuerrillaMail, TempInbox, MailEater, TrashMail and over 2000 others.


5Mail exchanger (MX) test

Verifalia detects email addresses which do not have a valid mail exchanger. Behind the scenes, we even support many complex configurations, which, while no longer widely adopted in the modern web, were used in the early internet days and can still be found in some rare circumstances.

6Catch-all test

Verifalia detects and reports email addresses handled by catch-all (or accept-all, or even wildcard) mail exchangers, which accept every possible address for their domain.


7Mailbox existence check

Verifalia checks to see if an email address exists without having to send emails or notify the target; it does so by emulating the behavior of common mail exchangers and employing the SMTP protocol wisely.

Yahoo! supported as well

Our service can even validate mailboxes handled by Yahoo! – no simple feat, due to the company’s strict security measures -.

8Temporary unavailability detection

Verifalia detects temporary mailbox unavailability (such as mailbox over quota errors) and automatically retries each address multiple times at specific intervals, to avoid a condition known as greylisting (or graylisting) and return precise validation results.