General
These checks perform basic validation routines like checking if a field is filled out or if a field value is a valid email address.
required
Checks if a field is filled out
Checks if a field contains a valid email.
emailExists
Checks if a MX record exists for the domain of an email address. If the user enters an email address like "user@example.tld", Formhandler checks if a valid MX record exists for the domain &q...
url
Checks if a field contains a valid url.
equals
Checks if a field equals the configured value.
equalsField
Checks if a field value equals another field value
notEqualsField
Checks if a field value does not equal another field value
notDefaultValue
Checks if a field equals a default value set by a PreProcessor.