[noja]

> You're safe either way

Eh? Before they used track-me.example.com/IDHERE and got blocked, now they use IDHERE.track-me.example.com and don't get blocked.

Move the unique ID to DNS and Google will let it through.

[ZoF]

I assumed by safe you meant something else.

Yes if you load images they can track that you have opened the email.

I fail to see how that is 'unsafe' though. It's expected functionality.

[noja]

It's expected that they can track you, when before they blocked the images to prevent that?