Thunder Mail - Cheap and simple transactional emails API with Amazon SES
Mailwarm - The email warm-up tool.
PopcornNotify - Send simple emails and text messages from one API
MailReach.co - The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.
PigeonBot - Send emails via Slack with the /email command
Warmbox.ai - Warm up your cold email inbox, and never land in spam anymore!