MailCore 2 提供简单且异步的 API，可用于处理 IMAP、POP 和 SMTP 电子邮件协议。该 API 已经过全面重新设计。
MailCore 2 provide a simple and asynchronous API to work with e-mail protocols IMAP, POP and SMTP. The API has been redesigned from ground up.
