In same vein some e-commerce sites and payment processors secretly distrust commercial email services and don't tell you that they've blacklisted your email provider.
You go to make a car or flight reservation, enter all kinds of info including your credit card, and then bam, it says "Oops, something went wrong, try again later". Or an e-commerce site asks you to enter your email and they'll send you a confirmation code, but the confirmation email never comes.
I've determined by experiment--using a different IP but a Gmail email address--that a frequent cause is a secret bias against commercial email services. It's particularly infuriating because I think a commercial email user with a paid account is a much lower fraud risk than a free Gmail user.
Are you using a personal domain or one of theirs? If it’s a personal domain, make sure you have all of the DNS records set properly to make spam filters happy.
If it’s one of their domains, not sure, but I’d guess their free accounts originate a bunch of garbage due to the nature of their service.
Yeah, definitely not in total volume, but proportionally I suspect it’s a good amount. Not because PM is bad but because gmail is ubiquitously mainstream.
I mean, there’s some reason you’re being sent to spam. And it’s not anything about PM’s configuration, they use solid defaults that should make default spam filters happy.