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Connect one application to email accounts across major providers through a normalized API and webhook workflow.

Email API with delivery events and a shared usage balance

AWS email sending and receiving with region-specific production access

Email API and SMTP sending with inbound message routing to applications

Email campaigns and application messages with shared recipient capacity and delivery reports

Email delivery with retry keys, inbound mail and contact-based broadcasts

Test email and SMS workflows by routing app-generated messages to controllable inboxes and numbers.

Collaborative email design with workspace-specific brands, approvals and export connectors

Interactive email campaigns with AMP forms, journeys and fallback content

Email diagnostics with separate spam, seed-placement and visual-preview test allowances

Free no-signup email tools and guides for email marketers.

AI email tool that writes and designs emails for Klaviyo.

Application email with distinct transactional and broadcast message streams

Email campaigns and automation within a wider messaging workspace

Email API and SMTP delivery with grouped unsubscribe management

Email production with reusable modules and explicit shared-versus-local edits

Sender-independent email previews and quality checks with per-screenshot usage

Hosted email design with independent saved blocks, synced sections and export controls

Email preparation, rendering checks and ongoing monitoring in one current platform

Email campaigns and triggered scenarios with an integrated content editor

Transactional email sending and inbound messages forwarded as JSON

SMTP and API email with independently configured application streams

Email API, SMTP and campaigns with batched event notifications

Product-connected marketing, lifecycle and transactional email