port problem dovecot imap

For example, dovercot open port 143. When i telnet on local 127.0.0.1 it is work. But port 143 don't want to open from remote!!
telnet myserver.net 143
do not work.

If I start dovecot on another port 10143 it's works!!

firewall is accept from nay to any!

Please help. Running on freebsd 8.0
 
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