Ideas for sealing up a drafty through-wall mail slot

Mailboxes & Mail Slots: Understanding Your Options through wall mail slot sleeve This is a mail slot sleeve is constructed from stainless steel It lines the cutout in your door that receives mail The sleeve is designed for through door through wall mail slot sleeve how to install secure mailbox slot in door to prevent stalkers, gaslight mail theft easy to follow

through wall mail slot Mail Slot will not rust or tarnish over time Easy to install by simply running a bead of silicone on both the interior and exterior sleeves and attaching