LevelBlue Completes Acquisition of Cybereason. Learn More
Get access to immediate incident response assistance.
No, it is not practical to block image spam using the "valid fingerprints" feature in MailMarshal SMTP. This feature only identifies individual files.
To learn about MailMarshal best practices for blocking spam, including image based spam, please see the following LevelBlue Knowledgebase article:
To contact LevelBlue about this article or to request support: