Looking for logging into the Horde Mail Failed site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Horde Mail Failed site. After that you can login as usual with your login credentials.
https://support.plesk.com/hc/en-us/articles/115001474445-Cannot-login-to-Horde-webmail-Login-failed-because-your-username-or-password-was-entered-incorrectly
https://support.plesk.com/hc/en-us/articles/213945845-Cannot-login-to-Horde-webmail-on-Plesk-Login-failed-because-your-username-or-password-was-entered-incorrectly
https://support.plesk.com/hc/en-us/articles/115002809473-Unable-to-log-in-to-Horde-webmail-after-enabling-TLS-1-1-on-Plesk-for-Linux-Could-not-open-secure-TLS-connection-to-the-IMAP-server
https://support.plesk.com/hc/en-us/articles/213407829-Horde-login-error-Unable-to-get-webmail-password-
http://kb.cloudblue.com/en/126581
https://forums.cpanel.net/threads/webmail-error-cant-login-squirremail-roundcube-horde.629051/
https://www.mailenable.com/forum/viewtopic.php?t=15727
http://eitwebguru.com/cannot-login-to-horde-webmail-plesk-login-failed/
https://knowledgelayer.softlayer.com/procedure/common-problems-horde-webmail-using-plesk
http://www.inmotionhosting.com/support/edu/cpanel/cpanel-email/logging-into-webmail
https://www.interserver.net/tips/kb/backup-restore-emails-horde/
https://www.fail2ban.org/wiki/index.php/Horde
https://bobcares.com/blog/horde-error-connecting-to-mail-server/