Tracking Newsletters (no replies)

Hi,

I need to tracking a newsletter.
I put the piwik tag in the newsletter and I see the pageviews of newsletter.
My problem is the pageviews in the site made by clicks on link in newsletter.
I create 2 Segment:
Entry by Newsletter - Url entry Page contains "X"
Newsletter - Page contains "X"
This 2 segment are the same pageviews.
Single cause for this is when click in link on newsletter the piwik create a new visit. how i can chage this?

Br,
Dário Santos