Category:Postal systems

• Mail

A

• Address

B

• Bulk mail

D

• Dead letter mail
• Dead letter office
• Delivery point

E

• Envelope

F

• Franking

I

• United States Postal Service irradiated mail

L

• Letter (message)
• Letter box
• Local post

M

• Mailing list
• Mixed franking

P

• Package delivery
• Pneumatic tube
• Poor man's copyright
• Post office box
• Postage due
• Postal code
• List of postal codes
• Postal savings system
• Postal stationery
• Postal voting
• Poste restante
• Postmark
• Precancel

R

• Rural delivery service

S

• Self-addressed stamped envelope
• Postage stamp

T

• Training stamp

U

• Universal Postal Union