Application email.
WHAT THE FRAMEWORK PROVIDES
Mail classes, templates, and configurable transport.
WHAT TO CONFIGURE
The transport and its credentials, in the environment.
WHAT TO USE ON YOUR HOSTING
An authenticated account on your own domain, or a dedicated sending service.
WHAT TO NEVER DO
Send with a visitor's address as the sender.
WHY
Your server is not authorised to send as their domain, and it fails authentication.
WHAT TO DO INSTEAD
Send from your own domain, and set reply-to.
WHAT ELSE MATTERS
That the sending route is covered by your mail authentication records.
WHAT TO QUEUE
Mail sending.
WHY
Sending during a request makes the visitor wait for a network operation, and a failure breaks the request.
WHAT TO TEST
Delivery to major providers, not only to your own domain.
WHAT TO LOG
That a message was sent, and any failure.
WHAT TO PROVIDE
An unsubscribe route for anything promotional.
WHAT TO CONFIGURE IN DEVELOPMENT
A transport that does not send, so tests do not mail real people.
