Goal
Automatically add URL parameters to all links in an email for tracking and attribution.
Background Information
You can define parameters in the group settings that are automatically appended to all links in an email. These parameters are name-value pairs and can include:
Static values
Personalization placeholders
Mapp Engage variables
When personalized, placeholders are replaced with the corresponding values stored in the system during sendout.
Procedure
Go to Audience > Group Management > Groups.
Locate the group used for sending the message and click the Change Settings icon next to it.
Open the Tracking & Links tab.
Expand the Link Parameters section.
Click the plus icon next to Add Link Parameter.
In the first input field, enter the parameter name. The name must not contain special characters or spaces.
In the second input field, enter the parameter value. You can:
Enter a static value
Insert a personalization placeholder
Use a Mapp Engage variable
To insert personalization or Engage variables, click the Personalization button.
To use standard parameters for web analytics, click the Web Analytics button.

Click Save.
The parameter will now be inserted into every link in emails sent to this group.
Example
You want to track each newsletter using an external message ID. To do this:
Parameter name:
exmidParameter value:
<%Message.ExternalID%>
If you enter november25_womenswear in the External Message-ID field during newsletter setup, the resulting links will look like this:
www.sportswear.com/?exmid=november25_womenswear