阿里企业邮箱支持在第三方客户端或者手机端上使用，支持国际通行的标准协议：

阿里企业邮箱接收POP服务器地址：
pop.qiye.aliyun.com
如果选择SSL，端口号是995（如果不选择SSL，端口号是110）

阿里企业邮箱接收IMAP服务器地址：
imap.qiye.aliyun.com
如果选择SSL，端口号是993（如果不选择SSL，端口号是143）

阿里企业邮箱发件SMTP服务器地址：
smtp.qiye.aliyun.com
如果选择SSL，端口号是465（如果不选择SSL，端口号是25）

pop协议与imap协议有何不同：

pop协议：pop方式只下载网页上收件箱中的邮件，其它文件夹的邮件不会被下载，在客户端上发送的邮件，也不会同步到邮箱网页端上面。pop协议下客户端上看到的邮件是本地电脑文件，pop模式下客户端新建的文件夹，类似于在电脑上新建文件一样，邮件都保存在本地电脑中，网页上的邮件即时删除，也不会影响客户端里面存在的邮件；

imap协议：imap方式设置客户端/手机端，网页上所有的文件夹的数据和客户端完全同步，网页端，电脑客户端，手机端不管收件箱还是发件箱所有的数据都是同步的，方便移动办公。（从品牌邮箱网的服务经验看，如果一个邮箱帐号有多个人同时使用，不推荐使用此协议）

Ali E-mail supports use on third-party clients or mobile devices, and supports internationally accepted standard protocols:

The POP server address for receiving emails from Alibaba Enterprise Mailbox:

pop.qiye.aliyun.com
If SSL is selected, the port number is 995 (if SSL is not selected, the port number is 110)

The IMAP server address for Ali enterprise email:

imap.qiye.aliyun.com
If SSL is selected, the port number is 993 (if SSL is not selected, the port number is 143)

The SMTP server address for sending emails from Ali enterprise email:

smtp.qiye.aliyun.com
If SSL is selected, the port number is 465 (if SSL is not selected, the port number is 25)

What is the difference between POP and IMAP protocols

POP protocol: POP mode only downloads emails from the inbox on the webpage, and emails from other folders are not downloaded. Emails sent on the client side are not synchronized to the mailbox webpage. The emails seen on the client under the pop protocol are local computer files. The folders created by the client in the pop mode are similar to creating new files on a computer. The emails are saved locally on the computer, and deleting them on the web page instantly will not affect the emails that exist in the client;

IMAP protocol: IMAP mode sets up the client/mobile client, and all folder data on the web page is fully synchronized with the client. All data on the web page, computer client, and mobile client, whether it is inbox or outbox, is synchronized, making it convenient for mobile office. (From the service experience of brand email network, if multiple people use one email account at the same time, it is not recommended to use this protocol)