Can't Apple access http?

No, short message service is a closed platform of operators, and it doesn't and won't open its interface to third parties, so the external network can't be connected. When the cellular data network is turned off, the short message cannot be sent through WiFi, which has explained the problem.

When IE can't browse the web, you can try to access it with an IP address first. If it is accessible, it should be a DNS problem. The DNS problem may be an error in obtaining DNS during networking, or it may be an error in the DNS server itself. At this point, you can manually specify the DNS service in the network properties.

Message format:

HTTP messages consist of requests from clients to servers and responses from servers to clients. The format of the request message is as follows: request line-general message header-request header-entity header-message body.

The request line starts with the method field, followed by the URL field and the HTTP protocol version field, and ends with CRLF. SP is the delimiter. Except that CF and LF are necessary in the final CRLF sequence, everything else can be omitted. For more information about general information title, request title and entity title, please refer to relevant documents.