Outlook

Outlook is an email provider for predominantly Outlook, Hotmail, and Live freemail addresses, headquartered in Washington as part of Microsoft. For legitimate messages going to the spam filter or getting blocked, you'll likely need to file a false-positive report with Outlook support. For globally-blocked IPs, the adminstrator of the IP will need to request delisting directly.

Domains

  • hotmail.com
  • outlook.com
  • msn.com
  • live.com
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421All 421 codes →

smtp;421 4.3.2 Service not available [outlook.com]

Low severity

450All 450 codes →

smtp;450 4.7.3 Organization queue quota exceeded. [outlook.com]

Medium severity

451All 451 codes →

smtp;451 4.3.2 Temporary server error. Please try again later ATTR17 [outlook.com]

smtp;451 4.4.0 Message failed to be replicated: No healthy secondary server available to accept replica at this time. [outlook.com]

Low severity

smtp;451 4.7.0 Temporary server error. Please try again later. PRX6 NextHop: outlook.com [outlook.com]

Low severity

451 4.7.650 The mail server [x.xx.xx.xx] has been temporarily rate limited due to IP reputation. For e-mail delivery information, see https://postmaster.live.com (S843)[#.prod.protection.outlook.com]

High severity

452All 452 codes →

smtp;452 4.3.1 Insufficient system resources (TSTE) [outlook.com]

Low severity

501All 501 codes →

smtp;501 5.1.3 Invalid address [outlook.com]

Low severity

550All 550 codes →

smtp;550 5.5.0 Requested action not taken: mailbox unavailable. [#.eop-nam12.prod.protection.outlook.com]

smtp;550 5.7.1 Service unavailable, MailFrom domain is listed in Spamhaus. To request removal from this list see https://www.spamhaus.org/query/lookup/ (S8002) [#.eop-nam02.prod.protection.outlook.com]

Critical severity

smtp;550 5.7.1 Unfortunately, messages from [x.xx.xx.xx] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [#.eop-nam02.prod.protection.outlook.com]

High severity

smtp;550 5.4.1 All recipient addresses rejected : Access denied [#.eop-nam02.prod.protection.outlook.com]

Medium severity

554All 554 codes →

smtp;554 5.2.122 The recipient has exceeded their limit for the number of messages they can receive per hour. For more information go to http://go.microsoft.com/fwlink/?LinkId=526653. (#) [outlook.com]

Other email providers

Built with

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