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Article ID: 127236, created on Oct 23, 2015, last review on Oct 23, 2015

  • Applies to:
  • Odin Business Automation Standard 4.5


Notifications sent from OBAS to customers are returned with the following error in Top > Configuration Director > Logging and Errors > E-Mails Logs > Incoming E-Mails

<>: host said: 550 5.1.1
<>: Recipient address rejected: (in reply to RCPT
TO command)


550 SC-001
(BAY004-MC1F14) Unfortunately, messages from <OBAS server IP address> weren't sent.
Please contact your Internet service provider since part of their network
is on our block list. You can also refer your provider to (in reply to MAIL
FROM command)


  1. According to AOL Error Codes

    Recipient address rejected
    This error indicates that the AOL member email address no longer exists or the address is misspelled.

    Please ask the e-mail address owner to check if the address is valid and replace it with a working e-mail address if necessary.

  2. The error concerns all domains that are hosted on Hotmail DNS servers even if they do not have "hotmail" in their names. According to the 550 SC-001 error is

    Mail rejected by for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation. If you are not an email/network admin please contact your Email/Internet Service Provider for help.

It seems that the IP address of your OBAS server is in the Hotmail's block list. To resolve that, please contact Hotmail.

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