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Retarus Glossary

Email Security Report

Attachment-Type

The email has been quarantined because it contains a file attachment that is on a blacklist that applies to you. The attachment was usually blocked because it could be used by attackers to spread malicious software.

  • Threat Level 3 of 5*



Blacklist

The email was blocked because the sender's email address was on one of your blacklists. It is therefore an undesirable or possibly even fraudulent sender.

  • Threat Level 3 of 5 *



Custom Rule

The email has been quarantined based on a custom policy configured by your administrator within the Retarus Predelivery Logic.

  • Threat Level 2 of 5*



CxO Fraud

The email was checked by Retarus CxO Fraud Detection and classified as suspicious or potentially fraudulent on the basis of a possibly forged sender address. For your protection, the email was moved to quarantine.

  • Threat Level 4 of 5 *



DKIM

The DKIM (DomainKeys Identified Mail) signature of this email is invalid. Either the sender could not be verified, so he may have been falsified, or the content of the email was changed during transport. The origin and content of the email are therefore questionable, which is why the email was moved to quarantine.

  • Threat Level 4 of 5 *



Message Size

The email was blocked because its attachments exceed the maximum size permitted by your company.

  • Threat Level 1 of 5 *



NDR Spam

If there is an unusually high number of NDRs (Non Delivery Report, "Bounce" message), automatic protection mechanisms will take effect and this email will be blocked. This prevents the so-called backscatter.

  • Threat Level 2 of 5*



Newsletter

The email was classified as a potentially unwanted newsletter and has therefore been quarantined.

  • Threat Level 1 of 5*



Phishing

One or more links in the email are known to be harmful, so the email has been quarantined under suspicion of phishing. Phishing links are used by criminals to spread malware or obtain confidential information such as passwords; links in the email should not be clicked.

  • Threat Level 5 of 5 *



Sandboxing

The email attachments were subject to an in-depth analysis by the Retarus Sandboxing Service in a shielded environment using heuristic methods and algorithms, which delivered a suspicious result. As it could potentially be malware, the email was quarantined or deleted for your protection.

  • Threat Level 5 of 5 *



Spam

The email was classified as spam, i.e. unwanted advertising or even harmful, and has therefore been quarantined.

  • Threat Level 2 of 5*



SPF

The SPF (Sender Policy Framework) entry of this email is invalid, the IP address of the sending MTA is not stored in the DNS entry. This means that the sender may be forged, therefore the email has been moved to quarantine or deleted.

  • Threat Level 4 of 5 *



Virus

The email contains a malware-infected attachment. For your protection, the email including the attachment was deleted and cannot be retrieved.

  • Threat Level 5 of 5*



* : 1 = lowest, 5 = highest