mailer

What it means

1. One who sends mail.

   Large and frequent mailers may send material on a monthly basis to their house lists, test acquisitions several times a year to drum up new donors, and perhaps do a few special appeals on top of that.

   2009, Robert Bly, 88 Money-Making Writing Jobs, page 133

2. A computer program that sends electronic mail.
3. A packet or container designed for postal use.

   The cassette came in a brown paper mailer.

In a sentence

Large and frequent mailers may send material on a monthly basis to their house lists, test acquisitions several times a year to drum up new donors, and perhaps do a few special appeals on top of that.

2009, Robert Bly, 88 Money-Making Writing Jobs, page 133

Where it comes from

1. Proto-Indo-European*molko-der.?
2. Proto-Germanic*malhō
3. Frankish*malha
4. Medieval Latinmala
5. Anglo-Normanmale
6. Old Frenchmale
7. Middle Englishmale
8. Englishmail
9. Englishmailer

From mail + -er.