Get Access Token

POST/{tenant}/oauth2/v2.0/token
grant_type
client_credentials
client_id
Sender generated client id
client_secret
Sender generated client secret
scope
https://mailer.wilhloesch.com/.default
! Important: Use separate base URLs for authentication and mail APIs (MAILER_LOGIN_BASE_URL & MAILER_MAIL_ENDPOINT_URL) — similar to Microsoft API structure.