When we send transactional email, URL are replaced to be tracked by sendinblue It's explained here : https://help.sendinblue.com/hc/en-us/articles/209421325-Why-is-the-URL-of-my-links-different-from-what-I-have-chosen- However, I would like to disable this feature because : - some of my clients block these emails - i already experienced errors because the domaine was temporarily not reachable