原标题：189邮箱版本更新：查询电子账单、电子发票更便捷！ 新年之际，189邮箱的5.5.2版本秉承了“爱简单simple is not single”的理念，新增了用户反馈渠道，在“我的账单”...
The original title: 189 mailbox version update: query electronic bills, electronic invoice more convenient! 5.5.2 version of the New Year, 189 mailbox adhering to the "love simple simple is not in use" concept, a new user feedback channel, in the "bill" I...
