Looking for logging into the Plain Cram-md5 And Digest-md5 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 Plain Cram-md5 And Digest-md5 site. After that you can login as usual with your login credentials.
http://www.samlogic.net/articles/smtp-commands-reference-auth.htm
https://de.wikipedia.org/wiki/SMTP-Auth
https://de.wikipedia.org/wiki/CRAM-MD5
http://www.werthmoeller.de/doc/microhowtos/postfix/postfix_smtp_auth/test/
https://www.fehcom.de/qmail/smtpauth.html
http://support.ricoh.com/bb_v1oi/pub_e/oi_view/0001036/0001036199/view/netsys/unv/0114.htm
https://linuxconfig.org/how-to-perform-auth-digest-md5-cram-md5-command-line-smtp-authentication
https://www.heinlein-support.de/upload/mk3/cyrus-sasl.pdf
https://stackoverflow.com/questions/6787056/what-mechanism-does-gmail-use-for-user-authentication
https://mcmilk.de/docs/2004-03-sasl.pdf
http://postfix.state-of-mind.de/patrick.koetter/smtpauth/smtp_auth_mailclients.html
https://www.linode.com/community/questions/3159/sasl-cram-md5-postfix-smtp
https://wiki.dovecot.org/Authentication/Mechanisms