Email Sending Services Directory
SPF and DKIM configuration guides for popular email sending services.
Find the SPF and DKIM configuration settings for popular email sending services. Each service page includes the correct include mechanism, DKIM selector, and step-by-step setup instructions to authenticate your outbound email.
Google Workspace
ProductivityGmail for business with custom domain email.
Microsoft 365
ProductivityOutlook and Exchange Online for business.
Mailchimp
Email MarketingEmail marketing and automation platform.
Klaviyo
Email MarketingEmail and SMS marketing for ecommerce.
Brevo
Email MarketingEmail marketing, automation, and CRM (formerly Sendinblue).
Constant Contact
Email MarketingEmail marketing and online survey tools.
SendGrid
TransactionalTransactional and marketing email API by Twilio.
Mailgun
TransactionalEmail API for developers.
Postmark
TransactionalTransactional email service focused on deliverability.
Amazon SES
TransactionalAWS Simple Email Service for cloud email.
SparkPost
TransactionalEmail delivery and analytics platform.
HubSpot
CRMCRM, marketing, and sales platform with email capabilities.
Salesforce Marketing Cloud
CRMEnterprise marketing automation and email platform.
Zoho Mail
CRMBusiness email and collaboration suite.
ActiveCampaign
CRMCustomer experience automation with email marketing.