Engineering
How we build Reloop: architecture, systems design, and technical deep dives.
ENGINEERING/JULY 20, 2026
How We Handle Email Bounce Processing Automatically
Inside Reloop's bounce processing pipeline: classifying hard vs soft bounces, updating suppression lists, and protecting sender reputation automatically.
ENGINEERING/JULY 15, 2026
Building a Webhook Delivery System That Actually Retries
How Reloop built a reliable, observable webhook delivery system with exponential backoff, signature verification, and replay support.
ENGINEERING/JULY 10, 2026
How We Built a Multi-Tenant Email Delivery Queue with BullMQ
A deep dive into the job queue architecture powering Reloop's multi-tenant email delivery: rate limiting, priority lanes, and failure recovery.
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Drop-in SMTP + REST API. Reloop handles queuing, retries, and observability so you don't have to.