Looking for logging into the Sasl Authentication 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 Sasl Authentication Failed site. After that you can login as usual with your login credentials.
https://qiita.com/qiitamatumoto/items/030ba281066f2bea2829
https://support.plesk.com/hc/ja/articles/213373249--Postfix-MTA-%E3%81%A7-SMTP-%E8%AA%8D%E8%A8%BC%E3%81%8C%E6%A9%9F%E8%83%BD%E3%81%9B%E3%81%9A-SASL-login-authentication-failed-%E3%81%A8%E3%81%84%E3%81%86%E3%82%A8%E3%83%A9%E3%83%BC%E3%81%8C%E7%99%BA%E7%94%9F%E3%81%97%E3%81%BE%E3%81%99
http://takeda-h.hatenablog.com/entry/2014/09/18/004320
http://kajuhome.com/patio_thread/1301.shtml
http://www.aconus.com/~oyaji/suse/smtp-suse.htm
https://teratail.com/questions/18564
https://teratail.com/questions/69727
https://centossrv.com/bbshtml/webpatio/2219.shtml
https://ameblo.jp/yukisku/entry-11712834614.html
http://www.postfix-jp.info/trans-2.1/jhtml/SASL_README.html
https://serverfault.com/questions/211631/sasl-login-authentication-failed-ugfzc3dvcmq6-find-the-username
https://www.flagsystem.co.jp/news/archives/135
https://bobcares.com/blog/sasl-login-authentication-failed-generic-failure/