Common issues which can cause your open rates to be too high
SPAM filters clicking the links
Aggressive spam filters will click links in incoming emails before them being delivered. This is to make sure there is no malicious content in the email. NewZapp automatically tracks clicks as opens.
Unfortunately, there is no way for us to see if a link has been clicked by a spam filter or your intended recipient. If you see a high number of clicks from a single contact, it is likely to be a spam filter.
A contact has forwarded your email.
If your contact forwards an email through their email client, any opens for the forwarded email are recorded as additional opens for your contact. This is also the same for the clicks. Encourage contacts to use the Forward to a Friend link, this will help to track your opens accurately.