Field notes on AI-era growth, deliverability, voice, and messaging for developers and teams building on Orbit by Devotel.
Email OTP and magic links are both mailbox-possession proofs, but they differ in the return path, friction profile, expiry handling, and device-switch behavior. This decision guide picks between them per verification moment, with Devotel Orbit's Verify channel names for both.
Gmail and Yahoo's bulk-sender rules bind any tenant crossing 5,000 messages a day to Gmail — authentication (SPF, DKIM, DMARC), RFC 8058 one-click unsubscribe, and a spam-rate ceiling enforced in Postmaster Tools. This explainer decodes each requirement, maps it to the Orbit surface that enforces it, and draws the marketing-vs-transactional line both mailboxes already police.
Email deliverability is the share of your mail that actually reaches the inbox rather than the spam folder or a silent drop. It turns on four levers you control — SPF/DKIM/DMARC alignment, sender reputation, warmup, and bounce handling. This playbook walks the checklist a transactional-email operator runs in Devotel Orbit, as tenant-side controls you own, not platform-mandated claims.
Start free and ship your first voice, messaging, or email flow today, or talk to our team about your rollout. No annual contract, one pay-as-you-go bill across every channel.