Define which endpoint you want to use for sending messages. If you are operating under EU laws, you may be required to use EU region. {bbackup_94402fb9ba80f392e0976ece85f92b2b876bfcaed8d83250cc06083f7139c7d9}1$sMore information{bbackup_94402fb9ba80f392e0976ece85f92b2b876bfcaed8d83250cc06083f7139c7d9}2$s on Mailgun.com.