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Oct 15, 2024 · If an email message that you send can't be delivered to the intended recipient, Microsoft 365 or Office 365 typically generates an error code and sends a delivery status notification (DSN) to you. This notice is also known as a "bounce message" or "bounce-back message."
Sep 19, 2024 · Mail delivery failures with the message "Returning Message to Sender" can happen for many reasons, like wrong recipient addresses, full mailboxes, server connection issues, too-large emails, or spam filters.
Jan 15, 2021 · What happens if a server on your side can only use TLS 1.0 with SMTP? Will sending fail, and if yes, how do you notice TLS 1.0 or TLS 1.1 is the root cause of your email problems? There are different variables that impact this and we will try to mention most frequent scenarios.
Nov 18, 2023 · Despite repeated attempts to deliver your message, a connection to the remote server was closed abruptly. Contact the recipient by some other means (by phone, for example) and ask them to tell their email admin that it appears that your email system is unable to connecto their email system.
Oct 13, 2018 · “SMTP error from remote mail server after RCPT TO” error is a common error that affects email delivery. Here we’ve discussed five major causes our Server Support Engineers have seen and how we fix it.
Jan 25, 2023 · SMTP550: The message has failed because the other user’s mailbox is unavailable or because the recipient server rejected your message. SMTP 551: The mailbox your message was intended for does not exist on the recipient server. SMTP 552: The mailbox your message was sent to does not have enough storage to accept your message.
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Jan 25, 2010 · SMTP codes can be so confusing, especially those SMTP response codes and SMTP error codes like the dreaded SMTP error 550. These are often returned in bounced email, such as “550 Requested action not taken: mailbox unavailable” or “550 5 2 1 mail from refused spam site.”.
