Field notes on outbound infrastructure
Deliverability deep-dives, warmup mechanics, and the operational reality of running Microsoft and Google infrastructure at scale.
- Jul 10, 2026·7 min read
Optimizing DNS TTL for Cold Email Deliverability
Explore how DNS Time-To-Live (TTL) settings directly impact the update speed of your SPF, DKIM, and DMARC records, a critical factor for maintaining cold email deliverability and minimizing downtime during infrastructure changes.
Read post - Jun 28, 2026·6 min read
Microsoft vs Google Workspace for Cold Email in 2026
Which infrastructure wins for outbound in 2026? A frank comparison of deliverability, cost per inbox, and daily send limits.
Read post - May 14, 2026·5 min read
SPF, DKIM, and DMARC — a plain-English guide
Every outbound engineer eventually has to explain email authentication to a non-technical stakeholder. This is the version we send them.
Read post - Apr 2, 2026·7 min read
Warming inboxes that actually work
Most warmup tooling produces synthetic reputation. Here's what separates warmup that lifts inbox placement from warmup that only lifts vanity metrics.
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