Postini smtp problem?

Hi
I use postfix.when send mail to postini hosted customer get error


said: 451 Can’t connect to yyy.com - psmtp (in reply to RCPT TO command)) xxx@yyy.com

My config.
V3.30
Dmitry firewall

When deactive drop all is working.
I try first filter chain for postini jump last filter and accept but not work.
Thanks for all