This is an important security feature that helps to protect your account from unauthorized access You may be prompted to get a verification code at your recovery phone number or recovery email address for any of the following. Learn how to manage everything that concerns your aol account starting with your aol username, password, account security question and more. Find out how to add or delete a recovery mobile phone number or alternate email address from your aol account. Standardized codes are defined by ietf as documented in request for comments (rfc) publications and maintained by the iana List of smtp server return codes this is a list of simple mail transfer protocol (smtp) response status codes
Status codes are issued by a server in response to a client's request made to the server Unless otherwise stated, all status codes described here is part of the current smtp standard, rfc 5321. It uses a single interface that shows state, health, and performance information of computer systems.
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