If there any function to check the whole header part,for example,i need to filter some key work,like: xxxxx@xxxxx

It may be at any of below part:

Reply-To:
Return-Receipt-To:
X-Complaints-To:
Disposition-Notification-To:
TO:
CC:

If it can check the whole header,that is good.

Maybe you can add new rule like:

ALL: xxxxx@xxxxx

ALL means to check the whole header.

No matter it at at From To CC Received Subject X-Mailer References or any other colon.

We can certainly add a rule that can do that. However, could you please send us a few examples of what you're trying to do. I recommend you send us an email to our support address (support@synametrics.com) with a few examples of email headers and what would you be searching for in them. This will help our developers to create a filter that can parse the message the way you expect.