Messages Marked as Spam¶

If a legitimate message lands in Spam/Junk, check why it was flagged before changing the filter or allowlisting the sender.

For the recipient¶

1. Confirm the message is expected and inspect its sender address, links, and attachments.
2. If it is safe, mark it as Not Spam or move it to the Inbox. This may help your mail system recognize similar messages.
3. Check whether a mailbox filter or forwarding rule moved it.
4. If the message continues to be misclassified, ask your mail administrator to review its spam score and headers.

For the sender or domain administrator¶

• Confirm the visible From address is legitimate and the sending system is authorized.
• Verify that SPF includes the service that actually sent the message, without publishing multiple SPF records.
• Confirm DKIM signing is enabled and the published key matches the active selector.
• Publish a DMARC policy and review aggregate reports for authentication or alignment failures.
• Check that message content, links, and attachments are expected and consistent with your organization’s normal mail.

Use Spam Filtering and Whitelisting for allowlist guidance and DKIM, SPF, and DMARC Setup for DNS checks. Avoid allowlisting a broad domain solely to bypass filtering; this can allow forged or compromised messages through.