If you enable UTM tracking, Buttondown will automatically add UTM parameters to any outgoing links in your emails.
We add the following parameters to your links:
| Parameter | Value |
|---|---|
utm_source | The username of the newsletter |
utm_campaign | The slug of the email |
utm_content | The ID of the email |
utm_medium | email |
Note that we do not replace existing UTM parameters in your links. If you have existing UTM parameters in your links, they will be preserved; Buttondown will only append parameters that aren't already present.