Mobile phone Samsung i7 18 SMS, can't send email or multiple recipients, what's the matter?

Please check your email address for errors. It is very likely that your email address is incorrect. The mail protocol means that the mobile phone can send and receive mail in that way. IMAP is the abbreviation of internet message access protocol. As the name implies, it mainly provides a protocol for obtaining information through the Internet. Like POP, IMAP provides convenient e-mail download service and allows users to read offline, but IMAP can do more than that. The summary browsing function provided by IMAP allows you to read all the information, such as arrival time, subject, sender and size, before deciding whether to download or not. The full name of POP is post office protocol, which is used to receive e-mail. It uses TCP port 1 10. Now the third edition is commonly used, so it is called POP3 for short. POP3 still works in client/server mode. When the client needs a service, the software of the client (OutlookExpress or FoxMail) will establish a TCP connection with the POP3 server, and then it will go through three working states of the POP3 protocol. First, the authentication process will confirm the user name and password provided by the client, and then it will be transferred to the processing state. In this state, users can collect or delete their own mail. After completing the response operation, the client will issue a quit command, and then enter the update state to delete the mail marked as deleted from the server. At this point, the whole POP process is completed. SMTP is called Simple Mail Transfer Protocol, and its goal is to provide users with efficient and reliable mail transfer. An important feature of SMTP is that it can relay mail in transmission, that is, mail can be relayed by hosts on different networks. It works in two situations: first, e-mail is transmitted from the client to the server; The second is transmission from one server to another. SMTP is a request/response protocol, which listens on port 25 and is used to receive users' mail requests and establish SMTP connections with remote mail servers. See if one of your POPs is set correctly. Hehe, I'm glad to answer it for you. . .