I'm trying to send an email via AdminMessage API using PHP on Google App Engine.
I can send a "normal" email using Message, but I am not able to send "admin" emails.
Has anyone managed to send admin emails? Could someone share some code?
Yes, you can send admin messages using PHP.
All you need to do is replace your usage of the Message class with AdminMessage in your source code for sending a normal message, and don't specify any to addresses.