Hi Andy, thanks for your response.
Mailersend is fully authorized, I sent the Mailersend test message using emails with different domains and all the test messages arrived.
The shortcode I’m using is this: [church_admin type="register" allow_registrations="1" member_type_id="1" exclude="custom_fields,prefix" onboarding="0" full_privacy_show="0" admin_email="0"]
Please tell me your email so I can send you the temporary administrator login details.
I remain attentive, greetings and blessings.