Gmail Validation

how i validated the given gmail is correct or not.
update processing

def verify_Gmail(Gmail):
    i=0
    while i<len(Gmail):
        current=Gmail[i]
        i+=1
        if current>="a" and current<="z":
            continue;
        elif current>="A" and current<="Z":
            continue;
        elif current>="0" and current<="9":
            continue;
        elif current=="@" or current=="." or current=="_":
            continue;
        else:
            return False
    if Gmail[-10:]=="@gmail.com":
        return True
    else:
        return False
if verify_Gmail(input("Enter Your Gmail :")):
    print("valid")
else:
    print("invalid")