Pre-existing URL params are removed when UTM tracking is enabled

tl;dr: brevo removes url parameters when UTM tracking is enabled. That behaviour is undesired.
The better behaviour would be to add the UTM parameters to exising parameters.

Each of my contacts have a link as atrribute. For example
https://my-website.com/a/b/c?user=$user
where $user is different for each contact.

We add these unique links to some of our campaigns

However

  • if i set UTM tracking off → this works fine
  • if i set UTM tracking on → brevo removes the ?user=$user part and replaces it by ?_sc=...&utm_campaign=...&utm_id=......

That behaviour breaks the link. It should do is add the UTM params, without removing the existing params.
The desired result is: https://my-website.com/a/b/c?user=$user&_sc=...&utm_campaign=...&utm_id=......

Hello and welcome to the Brevo community.

For a message like this, you should contact support directly, either from your personal dashboard in the Help menu (?) or via email at contact@brevo.com.

This will allow you to receive a response more quickly, and the information will be forwarded to the development team so that, if this is indeed an unintended behavior, it can be fixed promptly.

Have a great day.