June 24, 20262 min read
SPF lookup limits in 2026: avoid PermError before mail breaks
Every include and redirect costs a DNS lookup. Cross the limit and receivers return PermError—often with no obvious signal in your sending tool.
blog articles about how to monitor e-mail
Every include and redirect costs a DNS lookup. Cross the limit and receivers return PermError—often with no obvious signal in your sending tool.
When primary MX records change unnoticed, secondary paths may never engage—or worse, both tiers accept mail with no clear routing policy.
A staged rollout plan for SPF/DKIM alignment, aggregate reports, and policy changes that do not surprise deliverability.
Brand indicators need aligned DMARC, a valid SVG logo endpoint, and often a VMC—here is the DNS checklist before marketing announces BIMI.