Automatically set options.sandbox on sparkpostbox.com `Client.sendMessage()` calls

[ewandennis]

The transmission endpoint now respects options.sandbox when sending from sparkpostbox.com so our "easy button" API clients should set the field appropriately when they detect sandbox domain use. The highest profile use of Client.sendMessage() is here.

[cloud-tribal]

I am getting this error "Sending domain sandbox option mismatch", yet I've configured my SPARKPOST_SANDBOX_DOMAIN and SPARKPOST_SMTP_HOST as per the docs.

What is the cause of this problem ?

[yepher]

@cloud-tribal I am a little confused by your comment. This library uses the SparkPost REST interface and not SMTP.

Can you tell me a little more about what your are doing? Are you integrating with Maven or are you using this library directly?