We open the Convergence webmail from a browser, connect without any issues, and read our academic emails. Then we try to replicate the same thing on a smartphone or in Thunderbird, and nothing works anymore. This scenario regularly occurs among staff at the Lyon academy, whether they work in Ain, Loire, or Rhône. The problem almost never comes from the password: it comes from the settings.
Functional Convergence webmail, mail client blocked: where to look
If the connection to Convergence webmail Lyon via webmail.ac-lyon.fr is successful, the account is valid. The password is correct. The issue lies between the device and the mail server.
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We can isolate the cause in three steps. First, check that the identifier entered in the mail client matches the academic format (first letter of the first name + last name, without the at sign). Then check the protocol and port. Finally, test with another network connection to rule out a local firewall blockage.
The email identifier differs from the full email address. This is the primary source of error. We mechanically type [email protected] in the identifier field, while the server only expects the short login (pnom). The webmail manages this distinction automatically, but a third-party client does not correct anything.
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IMAP and SMTP server: settings for ac-lyon.fr mail
The official academic guides impose precise settings. The slightest deviation prevents synchronization. Here are the values to enter in any mail client:
- Incoming server (IMAP): mail.ac-lyon.fr, port 993, SSL/TLS security.
- Outgoing server (SMTP): smtps.ac-lyon.fr, port 587 with STARTTLS. Outgoing authentication uses the same identifier and password as the incoming server.
- Username: the short academic identifier (pnom), not the full address. The password is that of the academic account, to be changed at the first connection to the webmail if it hasn’t been done yet.
On some Android smartphones, the “security type” field offers “SSL/TLS (accept all certificates)”. This setting bypasses a certificate rejection, but it reduces verification. In a professional environment, it is preferable to validate the certificate when the phone recognizes it without error.
Why IMAP instead of POP
IMAP synchronizes messages between the server and all devices. Deleting an email on the phone also deletes it from the webmail. With POP, messages are downloaded locally and disappear from the server. This leads to desynchronized inboxes, and the Convergence messaging system eventually becomes saturated without us realizing it.
Android and iOS smartphones: recurring connection errors
On Android, the native mail app sometimes tries to automatically detect the settings. For an ac-lyon.fr address, this detection almost always fails. We choose “Manual setup” from the start, then “IMAP Account”.
On iOS, the trap is different. The Mail app asks for a “hostname” for the incoming and outgoing server. If we leave the “Username” field pre-filled with the full address, the connection will be denied. It must be replaced with the short login.
The case of the initial password never changed
After the first connection to Convergence webmail, we are usually prompted to change the password. If this step has never been completed, the initial password remains active. However, some recent mail clients may refuse a password deemed too short or weak. Feedback on this point varies depending on the phone model and application version.
Full inbox and missing notifications: two related symptoms
A less visible problem occurs when we no longer receive new messages, without any error message. The academic mailbox has a limited capacity. Regularly emptying the trash and spam via the webmail prevents reaching the quota without noticing it.
When the quota is reached, the server rejects incoming emails. The mail client on the smartphone does not always display an alert. We simply believe that there is nothing new. A visit to webmail.ac-lyon.fr allows us to check the actual status of the inbox.
Android notifications: settings to check
After configuring the IMAP account, notifications do not automatically activate on all devices. In the account settings, we check that the synchronization frequency is set to “push” or a short interval. On some manufacturer overlays (Samsung, Xiaomi), the battery saver blocks background synchronization and cuts notifications without warning.
- Go to Settings > Apps > mail app > Battery, and disable optimization for this app.
- Check that automatic data synchronization is enabled in the general account settings.
- On Xiaomi/MIUI, add the mail app to the “allowed background apps” in the security settings.
Account security and best practices for connecting to webmail
The academic messaging system transmits via encrypted connections (SSL/TLS) between the device and the server. This encryption protects exchanges from interception, provided that the ports and protocols are correctly configured. A setting of “no security” on the outgoing server exposes the identifiers in clear text on the network.
Changing the academic password regularly remains the most effective measure. This change is made from the management portal of the Lyon academy, not from the mail client. After each modification, the password must be manually updated in each configured mail client, otherwise synchronization stops without any visible explanation.
Convergence webmail remains the reference to check that everything is functioning on the server side. When a mail client has issues, we always start by connecting to webmail.ac-lyon.fr. If the inbox opens normally, the account is functional, and the diagnosis focuses on the local configuration of the device.