Strange cyrus/imaps Logins without valid password
I found apparently successful logins from a foreign ip-address to our cyrus-imap server:
Nov 24 08:16:20 server-1 cyrus/imaps[12101]: starttls: TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (256/256 bits new) no authentication
Nov 24 08:16:20 s… Continue reading Strange cyrus/imaps Logins without valid password