Prompt for IMAP login in Usermin Webmail

SYSTEM INFORMATION
OS type and version Ubuntu Linux 24.04.3
Webmin version 2.610
Usermin version 2.510

Usermin webmail is behaving strangely. This is a new install of Virtualmin and a restore of my domain for an OS upgrade. When you log into Usermin webmail the main panel is blank and no email folders show on the left panel. When you click on Inbox you get the error “An error occurred listing mail in this folder: Failed to login to IMAP server : 2 [AUTHENTICATIONFAILED] Authentication failed.” User/pass is obviously correct as I can log into Usermin. After a long time you are given a prompt for IMAP login in the main panel. I enter in the same credentials as I used to log into Usermin and it loads up. I’ve installed RoundCube and have no issues getting right to my email.

Based on a previous topic I tried changing the theme to Framed. It has the same behavior, but the IMAP login username/password boxes pop up much faster.

Username/password is entered the same for Usermin and the IMAP prompt, and RoundCube is working fine. This server is a fresh install, so none of the settings are customized. I’m really at a loss why auth isn’t passing through to IMAP.

This sounds like an issue I had recently, where the /etc/usermin/mailbox/config file had mail_system=4 when it should have had mail_system=1.

I found this after some searching which led me to resolve my issue.

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This was it. You are a lifesaver!

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