GrowthFast LogoGrowthFast Logo
HomePricingContact
Sign InGet Started Free
← All posts

#email-authentication

Cards explaining SPF, DKIM and DMARC beside an authentication flow where all three checks pass, with example DNS records.
deliverability6 min read

SPF, DKIM & DMARC for Transactional Email

What each record does, how to configure all three correctly, and why alignment — not just passing — is what decides whether your transactional email reaches the inbox.

August 13, 2026
Dashboard with inbox placement, spam, open and click rate metrics, a four-step delivery journey and SPF, DKIM and DMARC records.
deliverability6 min read

Transactional Email Deliverability: The Complete Technical Guide

Why transactional email lands in spam, how mailbox providers actually score you, and the authentication, reputation and hygiene work that keeps critical email in the inbox.

August 13, 2026
logo

SentFast is an API-first platform for centralizing and sending emails from any system. Create reusable templates, manage dynamic variables, and connect your product, backend, or automations through a simple API — without duplicating email logic everywhere.

Links
BlogDocumentationPricingFAQPrivacy PolicyTerms of Service

Made with ❤️ by Juma. © 2026 SentFast - All Rights Reserved.