mailbag
noun uk/ˈmeɪl.bæɡ/ us/ˈmeɪl.bæɡ/
[ C ] (UK also postbag)邮袋，邮包
a large, strong bag used by the post office for transporting and carrying letters and parcels
[ C usually singular ]一批次的邮件数;关于同一主题的邮件数
the number of letters, emails, etc. received at one time or on one subject
Since the controversial programme was broadcast, the station's mailbag has been bulging. 自从那次有争议的节目播出后，广播公司的邮件数开始猛增。