Answer: mailing

AnswerCrossword Clue
MAILINGOperation Christmas card.
MAILINGPromotion department activity.
MAILINGPen pal's activity
MAILINGCatalogue company's activity
MAILINGCatalogue merchant's activity
MAILINGBatch of solicitations, maybe
MAILINGBatch of fundraising letters, say
mailingThe action or process of sending something by mail
mailingSomething sent by mail, esp. a piece of mass advertising
mailinga rented farm