Stunnel config snippet

$ cat stunnel.conf

cert = /etc/stunnel/mail.pem
pid = /var/run/stunnel.pid
setuid = stun
setgid = stun

debug = mail.notice

client = no

# Service-level configuration
[pop3s]
    accept  = pop3s
    connect = pop3

[imaps]
    accept  = 993
    connect = 143