I've never hit this with GMail, but I've hit this repeatedly with outlook.com/hotmail.com accounts. There's a persistent 20% chance of any given email to my acc

I've never hit this with GMail, but I've hit this repeatedly with outlook.com/hotmail.com accounts. There's a persistent 20% chance of any given email to my accounts being dropped silently. It's been enough of a headache that I haven't been able to migrate off GMail and that's frustrating as hell. Especially with important medical emails..