To send RCS with MailUp, you essentially need 2 things:

1. A certified Agent (sender), which you create directly on the platform by entering all the information required by MailUp.
2. Credits, which you use in MailUp to send SMS as well. RCS is always sent using credits, so if you purchase any credit package, you can use it for both sending RCS and SMS. To learn more, visit the dedicated page on the website.