How we automated dedicated-IP warm-up without overloading reputation
An engineering writeup of PulsePigeon's dedicated-IP warm-up automation: per-IP stage state, reputation gates, bounded evaluation, and fail-closed rollout controls.
Blog
Infrastructure
Engineering notes on mail transfer, routing, dedicated IPs, and the systems behind reliable email delivery, including limits and tradeoffs.
SMTP relay, explained — and why free public relays are not safe for production
What an SMTP relay does, how it differs from a transactional email API, and why the free public SMTP relays that come up in search results are a reputation risk you cannot afford.