Put a brick letter box without a flag. It works great, just keep it in the mailbox and stick it on the door when mail is sent out. The postman usually just sticks it back on the inside wall when he collects the mail.
KYODOLED Locking Wall Mount Mailbox,Mail Boxes Outdoor With Combination LockοΌSecurity Key Drop Box,12.59Hx 8.46Lx 3.35W Inches,White Large
36 Review
HopeWan Self Adhesive Mailbox Numbers, 2 Inch Door Numbers Stickers For Apartment Home Office Room, Set Of 10 Pcs. (2" 10 Pack ( 0-9 ), Silver)
48 Review
KYODOLED Combination Locking Wall Mount Mailbox For Outdoors - Large Security Key Drop Box, Measuring 12.59H X 8.46L X 3.35W Inches In Black
20 Review
Secure And Spacious: Decaller Black Metal Wall Mounted Mailbox With Key Lock And View Window
22 Review
Eco-Friendly Solarez UV Cure Grain Filler & Sealer - Perfect For Fine Furniture, Guitars, Pool Cues And DIY Woodworking!
10 Review
32Oz Gorilla White Waterproof Patch & Seal Liquid For Effective Sealing (Single Pack)
30 Review
Pack Of 1 Natural Wood Color 8 Ounce Bottle Gorilla Wood Glue
42 Review
Silver Holographic Stars Glitter Grout Tile Additive 100G - Easy To Use For Tiles, Bathroom, Wet Room & Kitchen
14 Review