Issues with TLS and Dovecot

[nukoso]

Hi there, I have this postfix+dovecot system.
I already got dovecot working with SSL (port 995). Now I want to enable POP3 with TLS in port 110, but when I configure my thunderbird or MS Outlook to use TLS I get an error message from thinderbird saying the server might be down or missconfigured.
Here's my dovecot -n output:

protocols: imaps pop3s pop3
ssl_listen: *
ssl_cipher_list: ALL:!LOW:!SSLv2
disable_plaintext_auth: yes
login_dir: /var/run/dovecot/login
login_executable(default): /usr/libexec/dovecot/imap-login
login_executable(imap): /usr/libexec/dovecot/imap-login
login_executable(pop3): /usr/libexec/dovecot/pop3-login
mail_location: mbox:/var/spool/mail:INBOX=/var/spool/mail/%u
mail_executable(default): /usr/libexec/dovecot/imap
mail_executable(imap): /usr/libexec/dovecot/imap
mail_executable(pop3): /usr/libexec/dovecot/pop3
mail_plugin_dir(default): /usr/lib/dovecot/imap
mail_plugin_dir(imap): /usr/lib/dovecot/imap
mail_plugin_dir(pop3): /usr/lib/dovecot/pop3
auth default:
  mechanisms: plain login
  passdb:
    driver: pam
  userdb:
    driver: passwd
  socket:
    type: listen
    client:
      path: /var/spool/postfix/private/auth
      mode: 432
      user: postfix
      group: postfix

As I said, plain pop3 works, SSL pop3 works, IMAP/s works, what's the problem? Any adivice is greatly appreciated!

[nukoso]

Nevermind... it was Avast... it was blocking STLS request, it doesn't support TLS!!
damn..
thank you a lot