Sentence examples for first class mail from inspiring English sources

All mailings were sent via first class mail, to ensure timeliness.

Is there any difference in using second and first class mail in terms of environmental impacts?

Is there any difference in emissions between second and first class mail?

Is first class mail transported by airplane and second class mail not?

The notices are sent by first class mail, but are not certified, she said.

The last posting day for first class mail this Christmas is Friday 20 December.

Non-first class mail (magazines and junk mail) that arrives during the summer will be discarded.

First-class mail revenue was $21.5 billion.

At the same time, its first-class mail business is being eroded rapidly by the Internet.

I understand your frustration, but don't lead with your checkbook (or first-class mail, either).

Netflix is one of the ten largest users of first-class mail in America.