Email compliance and validation with RFC 2822, 3.6.2 in Symfony

Question

I have an issue while validating a user email address through the Symfony Email Constraint and then trying to send an mail to this user through Swiftmailer.

Let's say my user is registering with name@@gmail.com (the double @ is an intentional typo for the example). This is successfully validated by the Email Constraint validation in Symfony, and the user is created in my database.

But when I try to send the mail using Swiftmailer, I get a 500 error

Address in mailbox given [name@@gmail.com] does not comply with RFC 2822, 3.6.2.

coming from Swiftmailer itself.

Answer 1

You can enable the strict mode in Symfony's EmailValidator, e.g. like this:

class Author
{
    /**
     * @Assert\Email(
     *     message = "The email '{{ value }}' is not a valid email.",
     *     mode = "strict"
     * )
     */
    protected $email;
}

As the docs say:

Uses the egulias/email-validator library to perform an RFC compliant validation. You will need to install that library to use this mode.

The egulias/email-validator is also used by SwiftMailer (see Swiftmailer's composer.json and PathHeader), so this should give you similar validation results.