Mickaël Guessant

Mickaël Guessant is the independent developer behind DavMail, a lightweight gateway that turns any Microsoft Exchange or Office 365 tenant into open, standards-compliant mail and groupware services. Originally created to let Linux mail clients connect to corporate Exchange servers, DavMail has evolved into a cross-platform proxy that exposes Exchange data through everyday protocols: POP, IMAP, SMTP for mail, CalDAV for calendars, CardDAV for contacts, and even LDAP for global address-book lookups. Installed locally or on a small server, the software listens on standard ports, translates each request into Exchange Web Services or Graph API calls, and returns data in a format any desktop or mobile client can understand. Typical use cases include running Thunderbird, Apple Mail, or Outlook 2011 against modern Office 365 tenants, syncing Android or iOS devices via CalDAV/CardDAV when native Exchange support is missing, and giving Linux-based CRM or ticketing systems a simple SMTP relay without opening full Exchange access. Administrators value the granular logging, offline credential caching, and ability to tunnel over OWA URLs when the standard RPC ports are blocked. The single-jar distribution keeps deployment minimal, while optional GUI and headless modes suit both laptop users and data-center gateways. DavMail by Mickaël Guessant is offered for free on get.nero.com, where the latest version can be pulled through trusted Windows package sources such as winget and installed individually or alongside other applications in one batch operation.