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Provider Directory 2026 Google & Yahoo Certified

Email Provider SPF & DMARC Setup Guides

Browse verified, RFC-compliant SPF includes, 10-lookup cost breakdowns, and DMARC enforcement policies for major corporate, transactional, and marketing email platforms.

Showing 12 Verified ProvidersPhase 1 Active (12 Primary Global ESPs)
Business Email Suite4 Lookups

Google Workspace (Gmail)

Official Business Gmail & Google Cloud Email

include:_spf.google.com
View DNS Setup Guide
Business Email Suite1 Lookup

Microsoft 365 / Exchange Online

Outlook, Exchange, and Office 365 Enterprise Email

include:spf.protection.outlook.com
View DNS Setup Guide
Transactional Email API1 Lookup

Twilio SendGrid

High-Volume Transactional & Marketing Email API

include:sendgrid.net
View DNS Setup Guide
Cloud Email Infrastructure1 Lookup

Amazon SES (Simple Email Service)

Scalable AWS Cloud Infrastructure for Transactional Email

include:amazonses.com
View DNS Setup Guide
Transactional Email API1 Lookup

Mailgun

Developer-First Email API & Verification Platform

include:mailgun.org
View DNS Setup Guide
Transactional Email Delivery1 Lookup

Postmark

Lightning-Fast Transactional Email with Dedicated Streams

include:spf.mtasv.net
View DNS Setup Guide
E-commerce Marketing1 Lookup

Klaviyo

E-commerce Marketing Automation & Customer Intelligence

include:klaviyomail.com
View DNS Setup Guide
Marketing & CRM Suite1 Lookup

Brevo (formerly Sendinblue)

All-in-One CRM, Marketing Campaigns & Transactional SMS/Email

include:spf.brevo.com
View DNS Setup Guide
Marketing & Sales CRM2 Lookups

HubSpot

Inbound Marketing, Sales Automation & CRM Platform

include:1234567.spf01.hubspotemail.net
View DNS Setup Guide
Business Email Suite1 Lookup

Zoho Mail

Secure Business Email & Productivity Suite for Teams

include:zoho.com
View DNS Setup Guide
Email Marketing Platform1 Lookup

Mailchimp

Global Email Marketing & Automated Audience Engagement

include:servers.mcsv.net
View DNS Setup Guide
Marketing Automation1 Lookup

ActiveCampaign

Intelligent Marketing Automation & B2B Sales Engagement

include:emsd1.com
View DNS Setup Guide

Expanding to 50+ Global Providers

Need a guide for Shopify, Salesforce, Mandrill, or SparkPost? We are validating DNS specifications for the next release batch.

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