Google announced that it is changing the way that delegate settings are managed within G Suite. The Gmail API is being expanded to handle these settings, and the Email Settings API, which had previously been used for controlling delegate relationships, will be deprecated as of October 16, 2019.
Twilio SendGrid's Email Validation API is now publicly available. The API validates email addresses by searching in real-time for errors such as typos, inactive, non-existent, disposable and shared mailboxes. Further, the API checks for proper syntax, DNS records, disposable domains, and more.