[hedora]

They could also add an "oops! I didn't mean to unsubscribe; please resubscribe me" button to the landing page after you click. I've seen that before.

As for the Apple ITP thing, they implemented a thing that looks for known trackers and strips them from emails. You're saying that this thing is incorrectly breaking the URL parameter for the opt out links? Is there an example of them actually doing that? It sounds like it would be a bug if it is happening.

I've also noticed that many places interpret "one click opt out link" to mean you have to click once on the resulting page, technically making it two clicks, but also preserving HTTP get vs post semantics.

I suppose they could also make it two clicks for people that are using text-only mail clients and will therefore send a get, but to use HTML to arrange for it to be a post for everyone else.

[EGreg]

Apple has a history of gradually strengthening ITP until it breaks all the tabbos you'd never expect.

Today it strips ?utm=928931823 from abc.com/foo?utm=928931823 but tomorrow it can strip the 928931823 from abc.com/foo/928931823 leaving abc.com/foo ... after all it can just look at all the links arriving in mail, and use an algorithm to deduce the pattern abc.com/foo/:trackingId and simply mangle the URLs.

Think they'll never do it? They already deleted FIRST-PARTY cookies and much more!