Multiple recipients - Mail send failure

[pamar1908]

Referring to the issue #309, I am trying to understand in which situation the email sending completely fails. I sent an email with 2 recipients, one valid and existent and one "info@johndoe2023.gr". The latter domain is non-existent. The message was successfully delivered to the valid email address.

[jstedfast]

That depends on the server. Some will accept addresses that they know are invalid and others won't.