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Learn the meaning and usage of HTTP response status codes, which indicate the server's response to a client's request. The codes are classified into five categories: 1xx, 2xx, 3xx, 4xx, and 5xx.
If your third-party email app is having issues connecting, sending, or receiving emails, you may need to reconfigure your account or update the app. Learn what to do if your app has stopped sending, receiving, or has lost connection to the AOL Mail server.
Learn about the Session Initiation Protocol (SIP) response codes, which indicate the status of SIP requests. The SIP response code 500 means Server Internal Error, which indicates that the server encountered an unexpected condition that prevented it from fulfilling the request.
SMTP server return code 250 means requested mail action okay, completed. It is a positive completion reply that indicates the server has accepted and delivered the message to the recipient. See the list of other SMTP status codes and their meanings on Wikipedia.
Learn the meaning and purpose of FTP server return codes, which are three-digit responses to client commands. The code for login successful is 230, which indicates that the user has been logged in and authorized by the server.
HTTP 404 is a standard response code that means the server could not find what was requested. Learn the history, causes, and variations of this common web error, and see how some websites have customized their 404 pages.
Logging is the act of keeping a log of events that occur in a computer system, such as problems, errors or information. Learn about different types of logs, such as event logs, transaction logs, message logs and server logs, and their uses and formats.
A crash, or system crash, occurs when a computer program or an operating system stops functioning properly and exits. Learn about the typical causes, types, and consequences of crashes, as well as how to debug and prevent them.