data services sp6 mail problem

Hi

Our new system is dataservices 4.2 sp6.(windows server 2012)

Our old system is data services 4.1 sp3(windows server 2008)

I open data service designer and crete new job to send mail.I use smtp_to('a@a.com', 'test', 'test', 0, 0) function;

when I run it, it says that "Failed to communicate with SMTP server on <QUIT> command"

the old and new system mail configuration are same.Old system works and new system doesnt work.What is thre problem.We cannot solve it.We need

urgent help.

Best Regards