JustEmails provides custom-domain email hosting for people and businesses managing multiple domains. Its flat $49 annual plan includes unlimited domains and mailboxes, avoiding per-user pricing and bringing messages from every address into one unified inbox. Users can organize and search mail across domains, reply from the appropriate identity, create aliases and catch-all addresses, and connect external Gmail or IMAP accounts.

The service supports IMAP and SMTP, with automated DNS setup for MX, SPF, DKIM, DMARC, and MTA-STS records. It can auto-provision settings with Cloudflare and Namecheap, verify DNS propagation, and rotate DKIM keys. JustEmails also offers a transactional email REST API, including 1,000 monthly sends on the base plan, signed delivery-status webhooks, and additional sending tiers. An MCP endpoint provides more than 140 tools for AI assistants such as Claude, ChatGPT, and Cursor to manage email tasks. The web app remains available for users who prefer a traditional interface. A seven-day free trial is offered, and subscriptions can be cancelled at any time.