Looking for logging into the Jira 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 Jira Mail Failed site. After that you can login as usual with your login credentials.
https://confluence.atlassian.com/jirakb/mail-and-mail-handlers-troubleshooting-211649643.html
https://confluence.atlassian.com/jirakb/diagnosing-mail-and-mail-handlers-issues-229180314.html
https://community.atlassian.com/t5/Jira-Core-questions/Can-not-find-atlassian-jira-outgoing-mail-log/qaq-p/105734
https://confluence.atlassian.com/jirakb/notifications-troubleshooting-203394737.html
https://confluence.atlassian.com/jirakb/troubleshooting-jira-service-desk-incoming-mail-790960076.html
https://community.atlassian.com/t5/Jira-questions/JIRA-incoming-mail-handler-authentication-failure-resolved-by/qaq-p/358119
https://confluence.atlassian.com/confkb/mail-troubleshooting-180847235.html
https://confluence.atlassian.com/jirakb/unable-to-connect-jira-to-exchange-server-using-imap-due-to-authenticate-failed-785323323.html
https://community.atlassian.com/t5/Jira-Service-Desk-questions/IMAP-POP-incoming-Mail-Server-setup-fails/qaq-p/699763
https://community.atlassian.com/t5/Jira-questions/Jira-EMail-logs/qaq-p/389944
https://community.atlassian.com/t5/Jira-questions/Set-up-an-Incoming-Mail-Server-but-get-authentication-error/qaq-p/838255
https://confluence.atlassian.com/bitbucketserverkb/mail-sending-failed-sign-in-attempt-prevented-815593009.html
https://confluence.atlassian.com/kb/atlassian-login-issues-833991866.html