Automatically send confirmation email for WordCamp talk submissions to applicants

[wiredpinecone]

As a failsafe in case anything goes wrong with a website, internet connection, etc. and while the junk mail ticket #3524 has not been resolved, the site would automatically confirm talk submissions, preventing data/information loss that has already been documented.

Camps could then add to the contact form that "if you don't see a confirmation email that your application has been recorded, please contact us."

This would also help to establish good communication with applicants from the very beginning.

[kraftbj]

There is a grunion_after_message_sent action that passes the following params:
$post_id, $to, $subject, $message, $headers, $all_values, $extra_values

See ​https://developer.jetpack.com/hooks/grunion_after_message_sent/

That action can be used to add a hooked function that sends an e-mail. The e-mail value in the $all_values array depends a bit on when it was added, but would be 2_Email on a typical default form field.

If this is insufficient, Jetpack can likely add passing a $comment_author_email that is set to the value of the last e-mail address field that is processed.

[ryelle]

#4299 was marked as a duplicate.

[dd32]

This ticket has been moved to GitHub ​https://github.com/WordPress/wordcamp.org/issues/606