2018-03 OAuth 2.0 authorization module reviewed
Access to the MailUp REST API resources has an improved algorithm for rate limiting. Even though the threshold of 5 calls/s is unchanged, clients exceeding this limit may experience a slightly different error rate.
Error code HTTP 429 is now returned instead of HTTP 403 when the rate limit is exceeded. As before, clients have to retry later when this error type occurs
The email alert at the very first access to API is no more sent to the technical contacts of the accessed MailUp account
The token type “MailUp” is no longer supported on v.1.1 of MailUp REST API. Clients using this value have to be migrated to the OAuth 2.0 flow using the “Bearer” token
2017-05 Import details, sending history & SMS APIs update