how to be informed through mails

[troester]

Depending on your "relation" fetch it from the database.
http://fabrikar.com/forums/index.php?wiki/common-php-tasks/#select

 

[gapper]

Related data is fit as answer or do you mean something else for "relation"?

 

[troester]

What do you mean with "Related data" in a form?
I don't know how and by which means teacher is related. It's up to you to follow your relation(s) (via php and MySQL) to fetch the email.