Extended E-Mail Validator/Checker

[solverat]

Q	A
Bug report?	no
Feature request?	yes
BC Break report?	no
RFC?	no

• Introduce new Service Tag form_builder.validator.email_checker
• Introduce a new Validator "Email-Checker" for input fields (Also applies on emailAddress field within the double-opt-in form)

Workflow

This Validator iterates services tagged by form_builder.validator.email_checker. If a service returns false, a form error will be appended (This value is not a valid email address.).

Extensions

• Add https://github.com/disposable-email-domains/disposable-email-domains to composer suggestion (do not require it by default!)
  • If installed, a DisposableEmailAddressValdiator Services will be registered by form builder

Additional services

• https://www.usercheck.com/
• https://check-mail.org

can be added easily on project level