Guilty until proven innocent, an excellent initial position.
I’ve had to relax my SPF record to include the entire mail pool of my ISP to be able to send to anything hosted by Microsoft. I tried to liaise with them directly, and through Linode, but they refused to exclude the IP from their opaque blocklist. Their proposed solution was to change the IP of the VPS, but that’s just agreeing to play whack-a-mole with a bad faith actor.
There should be a path to greater transparency and accountability from the SMTP cartels, but I’m at a loss as to how that can manifest.
I’ve had to relax my SPF record to include the entire mail pool of my ISP to be able to send to anything hosted by Microsoft. I tried to liaise with them directly, and through Linode, but they refused to exclude the IP from their opaque blocklist. Their proposed solution was to change the IP of the VPS, but that’s just agreeing to play whack-a-mole with a bad faith actor.
There should be a path to greater transparency and accountability from the SMTP cartels, but I’m at a loss as to how that can manifest.