![]() ![]() This is usually a sign this is an abandoned email.ĥ53: The message was refused because the mailbox name is either malformed or does not exist.ĥ54: This is a default response that can be caused by a lot of issues. There is usually an accompanying message that will tell you more about the response.Ħ02: The message cannot be delivered to the recipient after attempting to send for eight hours. It is likely a fake, or it was mistyped.ĥ51: The intended mailbox does not exist on this recipient server.ĥ52: The recipient’s mailbox has exceeded its storage limits. Often, this is because too many messages or connections have been made in too short a time.Ĥ50: The message failed because the recipient's mailbox was unavailable, perhaps because it was locked or was not routable at the time.Ĥ51: The message simply failed, usually due to a far-end server error.Ĥ52: The message has been deferred due to insufficient system storage.ĥ50: The user’s mailbox was unavailable, usually because it could not be found, or because of incoming policy reasons. The most common code you’ll see is 250, which means the message was accepted by the recipient server and your send was successful.įollowing are some other codes you might see.Ĥ21: Messages are temporarily deferred because of recipient server policy. For example, 200 responses are usually success responses, 400 responses are usually deferrals, and 500 responses are hard failures that are not retried. The first digit of the code tells you what kind of response it is. Facebook Examining Public Reactions to Nonprofit Organizations' Informational, Promotional, and Community-Building Messages. This code is included in the “Summary” column of the Activity Log. It is your shared space to customize and express what’s on your mind and share content and experiences in the moment together on any device, anytime, anywhere. Each time you make an SMTP call, it returns a response in the form of a three-digit code. Messenger helps you connect with the people you care about most. Simple Mail Transfer Protocol (SMTP) is the communication protocol for sending email.
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