Practical insights, guides and updates about email hosting, infrastructure, security and growing your email business.
Every include and redirect costs a DNS lookup. Cross the limit and receivers return PermError—often with no obvious signal in your sending tool.
Read: SPF lookup limits in 2026: avoid PermError before mail breaks →When primary MX records change unnoticed, secondary paths may never engage—or worse, both tiers accept mail with no clear routing policy.
Read: MX failover monitoring: detect priority drift before mail queues stall →Reminder emails are gone. Teams that depended on inbox alerts need continuous certificate visibility—before browsers and APIs start failing.
Read: Let's Encrypt stopped expiry emails: what to monitor instead →A successful change in your DNS panel is not the same as the world seeing it. TTL, caching, and regional resolvers create partial states that look like random outages.
Read: DNS Propagation Monitoring — Catch Silent Failures →A staged rollout plan for SPF/DKIM alignment, aggregate reports, and policy changes that do not surprise deliverability.
Read: DMARC alignment basics: p=none to quarantine without breaking mail →Brand indicators need aligned DMARC, a valid SVG logo endpoint, and often a VMC—here is the DNS checklist before marketing announces BIMI.
Read: BIMI DNS records: what to publish before inbox logos go live →A successful change in your DNS panel is not the same as the world seeing it. TTL, caching, and regional resolvers create partial states that look like random outages.
Read: DNS propagation monitoring: catch silent failures early →