Since there are too many different devices, languages, versions out there, We cannot make tutorial for each of time.
But the principle is the same:
由于设备、语言和版本种类繁多，我们无法为每个版本都制作教程。
但原理是一样的：

1. Find out Incoming Mail Server name, change server name to h12.hksx.com.
2. Change the password to new one.
3. Find out Outgoing Mail Sever name, repeat the above steps. Yes, every device have Incoming and Outgoing mail server, no exception. You must change in both places.
4. Try send/receive one email to yourself
5. If successful, it is done.
6. If not successful, try change the POP3/IMAP/SMTP connection method to one of the followings:

1. 找到收发服务器名称，并将其更改为 h12.hksx.com
2. 更改密码。
3. 尝试向自己发送/接收一封电子邮件
4. 如果成功，则表示操作完成。
5. 如果不成功，请尝试将 POP3/IMAP/SMTP 连接方式更改为以下任一方式：

Incoming mail server 內送郵件服務器

• server name 服務器名称: h12.hksx.com
• POP3 use port 110 (No-SSL) or 995 (SSL)
• IMAP use port 143 (No-SSL) or 993 (SSL)

Outgoing mail server 外寄郵件服務器

• server name 服務器名称: h12.hksx.com
• port 465 (SSL)
• port 587 (STARTTLS)
• port 25 (No SSL)