Case Study: Mastodon achieves reliable transactional email delivery with Postmark

Powering email for the independent, open-source Twitter alternative

Mastodon, the decentralized open-source social media platform, needed a reliable transactional email provider when a sudden surge of new sign-ups caused its previous service to hit send limits and stop delivering critical confirmation emails. With support from the original provider unavailable, Mastodon turned to Postmark and its SMTP service to keep new users from getting stuck during account setup.

Postmark quickly helped Mastodon verify its sending domain and get SMTP credentials configured, and the team confirmed the account was ready to handle increased traffic without limits. Postmark then sent Mastodon’s queue of 550,000 registration emails in just a few hours without issue, and today it powers Mastodon.social’s transactional emails, including confirmations, password resets, and notifications, reliably and fast.

Mastodon

Renaud Chaput

Chief Technology Officer