Oh my goodness, yes, safelinks: no doubt they provide some security benefits but from a UX perspective I detest them. The redirect to the real URL often takes far too long and sometimes Outlook, being the apparently single-threaded "let's make all network requests on the UI thread" pile of stinking fecal matter that it is, appears not to respond to your click, so you click again, and then maybe again, and then maybe yet again... and then all of a sudden you've got four browser tabs opening up to load the same URL and taking several seconds to redirect.

I hate, hate, hate, HATE, HATE safelinks.