https://tsecurity.de/de/1507257/IT+Reverse+Engineering/Sicherheitsl%C3%BCcken/Dovecot+up+to+1.2.15%2F2.1.15+IMAP4%2FPOP3+SSL%2FTLS+Handshake+improper+authentication/
Dovecot up to 1.2.15/2.1.15 IMAP4/POP3 SSL/TLS Handshake improper authentication