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List of Hotmail Error Codes?

hotmail error codes

The Hotmail error codes apply to recipients with Hotmail, live or outlook.com domain names.

These are of two types:

  • The Error codes as 4xxx are: Temporary errors
  • The Error codes as 5xxx are: Permanent/fatal errors

Alternative errors:

  • 421 RP-001

In this, the mail server IP connecting to Outlook server has exceeded the rate limit allowed. The Reason is being related to IP/domain reputation.

  • RP-002

In this, the mail server IP connecting to Outlook server has exceeded the rate limit allowed on this connection. Reason for rate limitation is related to IP/domain reputation.

  • 421 RP-003

The mail server IP connecting to Outlook server has exceeded the connection limit allowed. Reason for limitation is being related to IP/domain reputation.

  • 550 DY-001

The error occurs due to the mail rejections by the outlook because of policy reasons. We generally do not accept email from dynamic IP’s as they are not typically used to deliver unauthenticated SMTP email to an Internet mail server.

  • 550 DY-002

In this, the Mail is rejected by Outlook for policy reasons. The likely cause is a compromised or virus infected server/personal computer.

  • 550 OU-001

In this, the Mails are rejected by Outlook for policy reasons.

  • 550 OU-002

Mail rejected by Outlook for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation.

  • 550 SC-001

Mail rejected by Outlook for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation.

  • 550 SC-002

Mail rejected by Outlook for policy reasons. The mail server IP connecting to Outlook has exhibited namespace mining behavior.

  • 550 SC-003

Mail rejected by Outlook for policy reasons. Your IP address appears to be an open proxy/relay.

  • 550 SC-004

Mail rejected by Outlook for policy reasons. A block has been placed against your IP address because we have received complaints concerning mail coming from that IP address. We recommend enrolling in our Junk Email Reporting Program (JMRP), a free program intended to help senders remove unwanted recipients from their email list.

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