We have been using Tencent Enterprise Mailbox's SMTP as the main way to send emails. However, recently, Tencent Enterprise Mailbox has started to have various problems when sending emails. On the one hand, with the increase in subscribers and the adoption of MailPoet Newsletters, a large number of push emails have to be sent every time an article is updated, which will cause Tencent corporate mailboxes to limit sending letters.