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Email validation

Updated this month

We can also verify the existence of e-mail addresses. Foxentry is not just checking the input format for them, it really verifies the existence of e-mail records in the domain and the ability of e-mails to receive new messages. You can use email validation in 2 versions - basic validation and advanced validation (default).

Key features - basic validation

  1. Checking the format of the entered e-mail - we check whether the e-mail does not contain incorrect characters and whether it contains all the necessary data.
  2. Autocomplete at the most common typos - we will notify the user of an error if the e-mail is entered incorrectly and offer him a relevant equivalent by the autocomplete. When the e-mail "[email protected]" is entered, the message "Did you mean [email protected]?"
  3. Callback after validation - after each insertion of an e-mail into the form, Foxentry can trigger a developer-defined action. You can respond to valid or invalid e-mails yourself.
  4. Appearance settings - you can easily set most properties directly in our administration. More complex adjustments can be solved using CSS. In the administration you can easily edit:
  • display of info messages and statuses
  • the behavior of the individual fields in your form
  • direction to the next field after filling
  1. Setting limits - in the administration you have the option to set the maximum number of requests per day, allowed IP addresses or on which URLs can Foxentry be displayed.
  2. Secure transmission via SSL - all communication with our server is encrypted. No third party can access the data. We only store anonymized data in our database (e-mail petr@****.com), which is used only for the correct reading of credits and for your control.

Key features - advanced validation

Advanced validation has all the features of basic validation and in addition, you will find:

  1. Domain check - we verify the existence of the domain and, if necessary, notify the user of the error.
  2. Email records on the domain - we find out if the domain has set up email records.
  3. Ability to receive e-mails - for a given e-mail we evaluate the ability to receive new messages.


To use it in the web form, you need to:

For installation in applications, internal systems, etc., visit our API page.

Still having trouble? Leave us a note.