Mailtrap

Mailtrap is an email delivery platform that combines sending, testing, and campaign management in one service. It provides an Email API and SMTP relay for transactional and promotional email, an Email Sandbox for capturing and inspecting messages in development and staging environments, and Email Marketing for promotional campaigns. The platform also supports inbound email through dedicated addresses, real-time webhooks, and API access, with deliverability analytics covering opens, clicks, bounces, and mailbox-provider-level performance.

Core capabilities include hosted HTML and text templates, SDKs, suppression management, bounce categorization, SPF/DKIM/DMARC domain verification, dedicated IP addresses with automatic warm-up, email throttling, reputation monitoring, and ISP feedback loop data. Integrations are available for Supabase and Vercel, while Claude Code, Cursor, Google Antigravity, and the Mailtrap MCP Server enable sending email, managing templates and domains, and retrieving delivery statistics from AI-assisted workflows. Account features include user management, 2FA, SSO, sub-accounts, audit logs, and content-free logging on higher tiers.

Mailtrap is aimed at developers, QA teams, and product or marketing teams that need to test, send, and monitor email. Sending and testing are packaged as separate plans with free tiers, paid editions, and usage-based email volumes; annual billing is available for testing plans, and Enterprise options include custom contracts, unlimited seats, and dedicated deliverability support.