Roundcube login

Karl_Thomas

• January 11, 2026 02:06
• Edited

I have an unusual issue where I can login to all but one Roundcube email accounts via cpanel.

I have one address when I click  the 'Check Email" button in cPanel / Email Accounts. Instead of loading the  usual page with the large RoundCube button, it goes to a basic RoundCube login screen and always displays login failed. 

The login and password are 100% correct and this only happens on one account on a domain while other accounts on  the same domain work perfectly.

The maillog on the server says:
imap-login: Login aborted:  Connection Closed (auth failed, 1 attempted in 2 seconds)  (auth failed: 

Any help would be appreciated

• 

  Karl_Thomas

  • January 11, 2026 02:46

  An update on this.  
  I found this post discussing cPHulk Brute Force Detection causing the issue,  when i disable cPHulkI can login. 
  If I whitelist my IP address and enable, it still stops working. 

  https://support.cpanel.net/hc/en-us/community/posts/21644186556695-Weird-issue-with-webmail

  0
• 

  cPRex Jurassic Moderator

  • January 12, 2026 13:14

  It sounds like it could be account or username-based protection then.  If you check the cPHulk page do you see anything in the "Blacklist Management" or "History Reports" tab that gives you more details?

  0

Please sign in to leave a comment.