With Mailster you can track opens, clicks unsubscribes and bounces
To track if your subscribers open a campaign Mailster adds a small 1 by 1 pixel image on the end of each campaign. If your subscriber opens the message this image get’s loaded from your server and Mailster counts an open.
Some email clients block external images so even if the subscriber has opened the campaign no open is recorded since the images are blocked.
An explicit open is when the client loads the image from the server
When the users clicks a link in your campaign Mailster assumes it has to be open as well. For this reason Mailster will count a click as well as an open.
Clicks are counted either as unique clicks or total clicks. If a subscriber clicks a link multiple times only a single unique click is counted
On the overview you can find two rates:
CTR – Click Through Rate
The first value is the Click Through Rate (CTR) and is based on the number of sent mails
ACTR – Adjusted Click Through Rate
The second value is the Adjusted Click Through Rate (ACTR) and is based on the number of opened mails