I had this issue recently with an influx of people using one of my domains for signing up for Uber. Unfortunately Uber (and most service providers) do not care about this. ProtonMail's workaround was to create a Sieve Filter, however, that does not bounce back. I've had to result to disabling my catch-all. Please implement this feature.
I had this issue recently with an influx of people using one of my domains for signing up for Uber. Unfortunately Uber (and most service providers) do not care about this. ProtonMail's workaround was to create a Sieve Filter, however, that does not bounce back. I've had to result to disabling my catch-all. Please implement this feature.