TrekMail is a multi-domain email hosting platform built for agencies, freelancers, small businesses, and teams that manage more than one domain. Instead of charging per user, TrekMail offers flat pricing: a single plan covers up to 1,000 domains and unlimited mailboxes, which makes it a practical alternative to per-seat services such as Google Workspace, Microsoft 365, Zoho Mail and Rackspace Email. The platform provides standard IMAP and SMTP access, a modern webmail client with calendar and contacts, catch-all and alias support, email forwarding, and the option to bring your own SMTP provider. Additional tools include a bulk email verifier, cloud file storage, assisted migration from other providers, and an API with MCP integration for AI assistants. Hosting is EU-based and GDPR-compliant, and every plan can be started for free without a card.