mailsack
nounUK /ˈmeɪlsæk/
US /ˈmeɪlsæk/
A mailsack is a big bag used to carry letters and packages.
The postman loaded the heavy mailsack onto the truck.
OTHER MEANINGS
2. A large canvas bag used by postal workers to collect and transport mail.
She slung the mailsack over her shoulder and began her route.
3. A bag used to hold incoming or outgoing correspondence in an office.
Drop your forms in the mailsack by the front desk.
4. A container for transporting parcels between sorting centers.
The mailsack was sealed and tagged for the overnight train.