'ssl_cipher_list' setting

Hi, I am Yoshi, Japanese.

I used

FreeBSD 10.1 Dovecot 2.2.15

I want pop3s, so I made

/usr/local/etc/dovecot/local.conf

ssl = yes ssl_cert =

It's work fine. But, change

ssl_cipher_list = ALL:!LOW:!SSLv2:!SSLv3:!EXP:!aNULL:!RC4

( SSLV3 -> SSLv3 )

I did trouble.

/var/log/maillog

Jan 6 05:41:53 example dovecot: pop3-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=xxx.xxx.xxx.xxx, lip=xxx.xxx.xxx.xxx, TLS handshaking, session=<5e9 zuO0LVwB+PO8D>

Is this bug ? or I did miss setting ?

Thank you for reading.

Yoshi