Unable to queue entity emails

simonbaese → changed the visibility of the branch 3528807-entity-email to hidden.

simonbaese → changed the visibility of the branch 3528807-entity-email to active.

Followed the steps below:
1. Installed Symfony Mailer, Symfony Mailer Queue, and the Contact module.
2. Created a contact form at /admin/structure/contact.
3. Overrode the contact form, and added the "Queue emails" email policy.
4. Submitted the testing contact form.

Result:
The email sending was delayed, and a new queue item was created.

The code also looks good to me.