Contact Gmail by Phone, when you receive 400 errors?
With the use of a Gmail account, you can also send an attachment file. If you see the Gmail bad request error 400 while working on it, then you should confirm that you don’t use gmail_imp files because it contains a cache that causes an issue for further action. Also, check your internet connection or try to refresh the webpage. If you still troubled the same, then contact us directly or Contact Gmail by Phone for a quick fix.