I have shown in the past how to change the WordPress new user notification by rewriting the wp_new_user_notification() function, which is a pluggable function. But the transition from WP 4.2 to 4.3 showed why even pluggable functions can be problematic. So here is a way to do it with a filter that almost no one knows about – wp_mail.
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About Chad Butler
Chad Butler is both a freelance writer and web developer. He has developed several popular WordPress plugins, including WP-Members and his writing has appeared on forbes.com, sfomag.com, and investopedia.com.