The academic webmail of Nantes as we knew it no longer exists. Since January 12, 2026, the Webmel service has been permanently disabled, and most of the reported issues by staff come from attempts to connect to a dead URL. Understanding this infrastructure change is a prerequisite for any troubleshooting.
IMAP and SMTP Configuration after Migration to messagerie.education.gouv.fr
Email clients (Thunderbird, Outlook, mobile applications) configured on the old IMAP and SMTP servers such as webmel.ac-nantes.fr or ia44.ac-nantes.fr no longer synchronize anything. Connections fail with errors like “server not found” or “timeout,” leading many users to suspect a network issue when the target server has simply disappeared.
The new platform, messagerie.education.gouv.fr, requires manual reconfiguration of incoming and outgoing settings. We recommend deleting the old account in the mail client rather than modifying the server fields: the associated certificates and ports differ, and a simple URL update often leaves residual configurations that cause authentication loops.
On smartphones, configuring via the automatic profile provided by the ETNA intranet (under the “Messaging” section) remains the most reliable method to avoid input errors in the IMAP and SMTP fields. Several academic guides detail the procedure to resolve a connection issue with the webmail by listing the updated server settings.
Authentication on the ETNA Portal: Username, Password, and Date of Birth
Access to the messaging system now goes through the ETNA intranet with three elements for authentication: academic username, password, and date of birth. This third field confuses users accustomed to the traditional login/password pair. It is not a captcha or a temporary measure, but a permanent identification factor integrated into the Nantes portal.
The academic username generally follows the format firstname.lastname (with a number suffix in case of duplicates). Any error in case sensitivity or the addition of a space results in a silent rejection, without an explicit error message. This is a recurring trap after a name change that has not yet been reflected in the directory.
Reset via moncompte.ac-nantes.fr
The portal moncompte.ac-nantes.fr centralizes account management: username recovery, password reset, and activation of the second factor. Most persistent blocks come from an expired password that was not renewed during school holidays.
The portal sends a reset link to the backup address provided during account creation. If this address has never been configured, only direct contact with the institution’s digital referent or the academic IT department can resolve the situation.
MFA Double Authentication and Accounts Locked for No Apparent Reason
Since the 2023-2024 period, several academies have generalized double authentication (MFA/2FA) for professional messaging. The Nantes academy follows this trend. Specifically, a temporary code is requested after entering the password, via an application like FreeOTP or by SMS depending on the chosen settings.
The problem arises when the authentication app has been installed on a phone that has since been replaced. The codes generated by the old device no longer work, and the account locks after several failed attempts. This lockout resembles a malfunction, but it is a deliberate security mechanism.
- Ensure that the MFA app is properly installed on the currently used phone and that the smartphone’s clock is synchronized (a time difference of a few minutes is enough to invalidate TOTP codes)
- In case of a phone change, re-register the second factor via moncompte.ac-nantes.fr before deleting the app from the old device
- If the account is locked, contact the academic IT department with an ID: the institution’s digital referent cannot unlock an MFA block themselves
Common Errors Related to Browser and Session Cache
Academic authentication portals use session cookies with short lifetimes. A browser that retains an expired cookie from the defunct Webmel sometimes redirects to a blank page or a 403 error on the new portal. Clearing the cache and targeted cookies on the domain ac-nantes.fr resolves this type of blockage in most cases.
Browser extensions (ad blockers, built-in VPNs, password managers that inject scripts) regularly interfere with the ETNA authentication process. Testing in private browsing mode before any other steps helps isolate the cause: if the connection works in private mode, the problem comes from an extension or corrupted cache.
Network Verification Points
Some institutional networks filter outgoing traffic on non-standard ports. If the connection fails only from the school’s network but works on 4G, the local proxy or firewall is likely blocking the flow to messagerie.education.gouv.fr. Reporting to the IT service of the managing entity (municipality, department, region depending on the level of the institution) is then necessary.
- Test the connection on 4G or from a home network to isolate local filtering
- Check that port 443 (HTTPS) is not blocked by a filtering proxy
- On shared computers in the teachers’ lounge, ensure that the Windows or Linux profile used has sufficient rights to establish TLS connections
The migration to messagerie.education.gouv.fr has removed the old departmental URLs without a gradual transition phase. Any attempt on webmel.ac-nantes.fr, ia72.ac-nantes.fr, or ia53.ac-nantes.fr results in a dead end. Updating bookmarks and reconfiguring mail clients remains the first action to take, even before looking for a server-side issue.
