When using python to receive 163 mails, it returns the error of FETCH Fetch volume limit exceed,
According to http://blog.sina.com.cn/s/blog_5ad2ece40100zl76.html, if you use a third-party program, there is a certain traffic limit every day.
Solution: Contact the online customer service to clear the traffic and make it available immediately.
In addition, I asked customer service, VIP mailbox also has this limitation.