Attempting to log into an email account results in the following error being written to
Apr 9 14:32:42 server dovecot: auth-worker(123456): Error: conn unix:auth-worker (pid=123456,uid=97): auth-worker<12>: pam(firstname.lastname@example.org,203.0.113.1,<dYh3cS/b+revF/K>): Multiple password values not supported
If the server is running Imunify360, its Exim and Dovecot bruteforce protection feature can cause the "Multiple password values not supported" error when logging into email accounts.
If you believe that blocked attempts to log into affected email accounts are legitimate, we recommend disabling Imunify360's Exim and Dovecot bruteforce protection feature. This can be done in the WHM -> Imunify360 plugin interface:
WHM -> Imunify360 -> Settings (the gear icon in the upper left of the interface) -> Uncheck "Exim+Dovecot brute-force attack protection" -> Save Changes