sql - MySQL Syntax with DELETE FROM?

I have this bit of SQL that always returns an error, though I can't find why it is returning the error. I have connected to the database with no errors. I'm running PHP 5.2.17, MySQL 5.5.25a, and Apache 2.4.2.

The SQL:

DELETE FROM mail WHERE to=1

The error:

You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near 'to=1' at line 1

Answer

TO is a reserved word, you need to use backticks:

 DELETE FROM mail WHERE `to` = 1