[EmailUtil](EmailUtil.md) [Entities](Entities.md) [FlowUtil](FlowUtil.md) [MessageUtil](MessageUtil.md) [SMSUtil](SMSUtil.md) [AttachmentMan](AttachmentMan.md) [AutoNumMan](AutoNumMan.md) [事件](%E4%BA%8C%E6%AC%A1%E5%BC%80%E5%8F%91.md)