MailForm

Seamlessly inherits validations, I18n, and naming from Rails ActiveModel, allowing form objects to behave like ActiveRecord models, as shown in the example with validates_format_of for email validation.

Defines form attributes with validation rules, file attachments, and captcha spam protection in a simple class, reducing boilerplate for contact forms, as demonstrated in the ContactForm example.

Appends client details like remote IP, user agent, and session to emails by setting the request object, useful for debugging and logging form submissions.

Includes MailForm::Delivery module to send emails on model lifecycle hooks, enabling integration with existing ActiveRecord models without extra code.