Sunnybox.io
Context.io
Nylas Mail
Resend
Gmail
Postmark
ShuttleCloud
Reverse Contact
Vim Python IDE
Sunnybox.io
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Context.io - Context.IO is a REST email API that makes it easy and fast to integrate your user's email data in your application
Nylas Mail - The Nylas Cloud API powers your application with email, calendar & contacts features. Built-in features for better email, calendar, and contact management.
Resend - Email for developers
Gmail - Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.
Postmark - Postmark is the easiest and most reliable way to be sure your important transactional emails get to the inbox. Simply & reliably parse recieved email to JSON for your webapp.
ShuttleCloud - ShuttleCloud is an API that allows developers to import address books from hundreds of email providers.