I have an account that I frequently sign into in an incognito session. Every time I do, Google emails the same account saying that it doesn't recognize the devi

I have an account that I frequently sign into in an incognito session. Every time I do, Google emails the same account saying that it doesn't recognize the device. I've tried requesting that it remembers the device, but despite the browser and IP address staying the same, it doesn't seem to matter. Though it also appears that I can ignore these warnings entirely. The biggest issue that I have is that I have an email account through my web hosting provider that isn't connected to Google. If I email anyone with a Gmail address, it gets rejected for being potential spam, despite not having any links or anything. Even if I respond to someone writing from a Gmail address, Google will reject it, saying that it was unsolicited since I was the one initiating the conversation, which is simply ridiculous. I usually end up logging into a separate Gmail account just to communicate with those users.