SSL в сочетании с серверами POP и IMAP
simap stream tcp nowait root /usr/sbin/stunnel imapd -l imapd
RANDFILE = stunnel.rnd [ req ] default_bits = 1024 encrypt_key = no distinguished_name = req_dn x509_extensions = cert_type [ req_dn ] countryName = Country Name (2 letter code) organizationName = Organization Name (eg, company) 0.commonName = Common Name (FQDN of your server) [ cert_type ] nsCertType = server
openssl req -new -x509 -days 365 -config /etc/stunnel.cnf -out /etc/stunnel.pem -keyout stunnel.pem openssl x509 -subject -dates -fingerprint -noout -in stunnel.pem
