usually these two are different:
mail.foriox.mlmail.foriox.ml.
First one is relative, means mail.foriox.ml.@ -> mail.foriox.ml.foriox.ml that’s usually not what you need/mean, you want just mail to mean mail.@.
Second one (note the dot at the end) is absolute.
I actually don’t remember if you can use relative names in MX records. On my domain it is absolute but I don’t know if I tried using a relative one.