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Inbound message is showing the following error, "550 Sender's policy prohibits this message (Solarwinds Mail Assure)

https://success.solarwindsmsp.com/kb/solarwinds_mail_assure/550-Sender-s-policy-prohibits-this-message

Inbound message is showing the following error, “550 Sender’s policy prohibits this message”

ARTICLE NUMBER: 000060039

DESCRIPTION

  • The inbound message is showing the following error, “550 Sender’s policy prohibits this message”

ENVIRONMENT

  • SolarWinds Mail Assure

SOLUTION

  • This indicates that the message has failed the SPF and/or DKIM checks and the sender’s DMARC policy is set to ‘Reject’
  • If this is a legitimate email:
    • Add the domain to bypass these checks temporarily.
    • Contact the sender to inform them of the error.

https://documentation.solarwindsmsp.com/mail-assure/documentation/Content/C_Domain%20Level/incoming/man-list-doms-ip-spfdkimdmarc.htm

Manage Domains and IPs with Disabled SPF, DKIM and DMARC Checks

The Manage list of domains and IP addresses with disabled SPF, DKIM, and DMARC checks page allows you to disable SPF, DKIM and DMARC checks for specific domains, IPs or subnets - so that if, for example, an SPF check fails for any of the specified domains or sender IPs, the system will continue to process the message.

In the Domain Level Control Panel, select Incoming - Protection Settings > Filter settings and click on the Manage list of domains and IP addresses with disabled SPF, DKIM, and DMARC checks link at the top of the page.

The following page is opened allowing you to add domains according to check type:

Domains may be automatically added to the Disabled SPF Domains list if a high number of messages that were quarantined due to failing the SPF check have been released and trained as not spam by the user.

Related links: