mailshot /ˈmeɪlˌʃɒt/

• 1. 

  N A mailshot is a letter advertising something or appealing for money for a particular charity. Mailers are sent out to a large number of people at once. 邮寄广告; 为特定的慈善机构做广告或诉取钱财的信函 [英国英语]

  例：

  Now, thousands of mailshots, catalogues and sales pitches go straight into the bin.

  现在，数千的邮寄广告、商家目录和促销传单直接就进了垃圾桶。