Two perpendicular lines intersecting, such as a plus sign or X letter.

Plus Sign

open envelope with a letter

Letter I

A big post box for mail with vertical stripes, a horizontal slot and a rounded top.

Post Box

Envelope Icon

A rectangular piece of paper with a folded corner and three lines on it.

Paper Icon

A free-standing pole with the letter "P" in a round square as a parking sign above the pole.

Parking Pole With Letter P 

An uppercase Latin alphabet letter in a tilted box with rounded corners.

Uppercase Latin Letter In Tilted Box

A closed envelope with a fire flame on its top corner, with a small shadow under its lid, for mail, email or inbox.

Burning Envelope

A Chinese letter in a tilted box with rounded corners.

Chinese Character In Tilted Box

A document icon represented by a rectangular piece of paper with a folded corner and curved edges.

Document Icon

X Sign

Open Mailbox With Flag Down

Burning Envelope Icon

A closed free-standing mail box with the flag up.

Mail Box

A woman with her hair tied up in a bun leading towards the side, wearing a long winter coat or parka, leggings and boots, holding a voting card or ballot paper.

Woman Wearing Winter Coat

An opened free standing mail box with a flag. 

Open Mail Box

A busy and overworked manager or employee surrounded by charts, graphs, and notifications.

Illustrations of letters