This link explains why this happens only with some email marketing campaigns: https://github.com/DataDog/browser-sdk/issues/2715#issuecomment-2359950290

We've found that these always seem to be coming from Azure, and the initial links being followed seem to be variations of links that were sent out in emails.

...

We think that what's happening is that an email scanner, possibly part of Outlook, is doing some sort of pre-check of links