A round speech bubble with a dollar sign inside.

Speech Bubble With Dollar Sign

A mailbox with letters inside and a bird standing atop.

Mailbox With Letters And Standing Bird

An envelope opening to show a piece of paper.

A "write a review" illustration with a cloud message, a pen and a thumb up icon.

A single opened envelope with nothing inside it. 

An icon indicating 100 unread messages or emails.

A round speech bubble with lines representing text inside it.

Three envelopes one on top of the other. 

Envelope attached to the string of a floating balloon.

An opened envelope with a letter coming from it.  

A full "share to social media" illustration with a loud megaphone, a smartphone, a paper plane and icons of an user and a share button.

A rectangular speech bubble with three lines of text.

A closed large manila envelope with a flap. 

A pop-up interface or browser window with a half body person and social media icons.

A cloud message icon or illustration with a cloud, a curved line and text.

A rectangular speech bubble with an three dashes inside it.

A sign for public display carried during a demonstration.

A curved outdoor mailbox with an envelope half sticking out of the mail slot. 

A chat bubble indicating 100 new followers.

An open envelope with a pointing cursor and a letter with a notification icon on its top corner.

A round speech bubble with an exclamation point inside it.

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