Case Study: Doorbell achieves reliable, cost-effective email delivery and easier troubleshooting with Postmark

Doorbell powers communication for websites and uses Postmark to send email to and from their customers.

Doorbell, a feedback collection and response tool founded by Philip Manavopoulos, struggled with missing and delayed emails and rising costs after Mandrill’s billing changes. Seeking a reliable, affordable delivery and inbound email solution, Doorbell adopted Postmark (using SMTP initially) to restore dependable message delivery and simplify email management.

Postmark provided a straightforward migration and tools—SMTP sending, a message history dashboard, the Postmark API and webhooks—that Doorbell used to track messages, parse replies, and surface bounces in the app and Slack. As a result, missing/delayed emails have noticeably dropped, every message can be located via Postmark’s dashboard, bounce handling prevents undeliverable sends, and Postmark’s lower monthly cost and reliability freed the solo founder to focus on product improvements.

Doorbell

Philip Manavopoulos

Founder