https://??.us?.list-manage.com/track/click?u=??&id=??&e=?? and contain three identifiers:
u,
e.
For example, the following is a link that appears at the top of a recent email newsletter I received:
https://pointer.us9.list-manage.com/track/click?u=e9492ff27d760c578a39d0675&id=6085259441&e=626d6fa0c9
# redirects to:
https://www.pointer.io/?utm source=Pointer&utm campaign=d184bdae50-ISSUE 228&utm medium=email&utm term=0 6ba2b83261-d184bdae50-606996230
Near the bottom of the same email, there is a similar looking (ie. same anchor text) link:
https://pointer.us9.list-manage.com/track/click?u=e9492ff27d760c578a39d0675&id=1624638cad&e=626d6fa0c9