The automatic update has been part of the core WP since version 3.7 and it is not a “hack”; it’s from WordPress.
Ones does not reply to this auto email.
For more information, including how to disable this functionality (discouraged, as it helps ensure an up to date secure site), have a read through this:
http://codex.wordpress.org/Configuring_Automatic_Background_Updates
So if this is an automatic update, why didn’t update my other WordPresssite, also hosted by the same hosting company?
Those other WordPress sites might have been created with a version of WordPress older than 3.7.
Why to bother? download your wp-config.php file on your desktop. Open it with your favorite text editor. At the bottom of that file, you will find a line which says:
/* That's all, stop editing! Happy blogging. */
Add following line of code.
define( 'WP_AUTO_UPDATE_CORE', true );
Your other WordPress website will have this feature too.
The line of code stated by Rajat:
define( 'WP_AUTO_UPDATE_CORE', true );
Should be put before the line that says:
/* That's all, stop editing! Happy blogging. */
Best practice is to keep user added definitions right after the comment
/* That's all, stop editing! Happy blogging. */
And, I love to follow clean code techniques and best practices. It make my life and job more easier, and things more clear.
Rajat, the comment of:
/* That's all, stop editing! Happy blogging. */
Means to put no more code after this comment so that is why any code added to wp-config.php has to be before this comment.
What do you declare on a fresh WordPress installation?
It go something like this:
Database Constants
Security Keys and Salts
Table Prefixes
Localized languages
Developer Debug
/* That's all, stop editing! Happy blogging. */
Mean to say, that your initial configuration is done. Stop editing any further. And, It is considered good practice to put other definitions after it.
By the way, this line of comment is looking a lot like Border between Countries. And, we have crossed without valid documents. 😀
It doesn’t matter what approach you choose until you stay comfortable.