Multi-account IMAP/SMTP email manager with RFC 8058 one-click unsubscribe, HMAC-signed tokens, and suppression list. Built for cold email outreach.
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Updated
Apr 14, 2026 - JavaScript
Multi-account IMAP/SMTP email manager with RFC 8058 one-click unsubscribe, HMAC-signed tokens, and suppression list. Built for cold email outreach.
The "it's not you, it's your mail server" fix for Okta bounce suppression.
Python worker that records hard-bounced course email recipients in an API suppression list.
Python example that turns normalized hard-bounce events into idempotent email suppression writes.
SparkPost (now part of Bird) is the world's leading email delivery platform, providing a REST API for sending transactional and marketing emails, managing templates, tracking analytics, handling suppressions, and processing inbound email.
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