SMTP: is a set of rules for transmitting messages from source to destination, and the relay is controlled letters. SMTP protocol is TCP / IP protocol suite, it helps each computer to find the next destination or transit when sending mail. SMTP protocol specified by the server, we can put on the E-mail sent to the recipient's server, the whole process only takes a few minutes. SMTP server is to follow the SMTP protocol to send e-mail server used to send e-mail or transit issued by the user.
The most common SMTP mailbox
Reference: https://blog.csdn.net/weixin_42197545/article/details/80977515
126 E-mail:
POP3 server address: pop.126.com (Port: 110)
SMTP server address: smtp.126.com (Port: 25)
139 E-mail:
POP3 server address: POP.139.com (Port: 110)
SMTP server address: SMTP.139.com (Port: 25)
163.com:
POP3 server address: pop.163.com (Port: 110)
the SMTP server address: smtp.163.com (Port: 25)
QQ E-mail:
POP3 server address: pop.qq.com (Port: 110)
SMTP server address: smtp.qq.com (Port: 25)
QQ E-mail:
POP3 server address: pop.exmail.qq.com (SSL-enabled port: 995)
SMTP server address: smtp.exmail.qq.com (SSL-enabled port: 587/465)
How to open QQ mailbox SMTP authorization method
Reference: https://jingyan.baidu.com/article/6079ad0eb14aaa28fe86db5a.html
How Tencent E-mail smtp settings
Reference: https: //jingyan.baidu.com/article/a378c960eabf1eb3282830f6.html