eXpurgate spam detection is based on eXpurgate technology and Eleven’s own Bulkcheck inspection procedure. During the initial spam check, a fingerprint of the e-mail, just a few bytes in size, is created. With Eleven Managed E-Mail Security, that takes place on Eleven’s servers; for Eleven In-House E-Mail Security, it happens within the customer’s infrastructure.
This fingerprint is then sent to the central eXpurgate database (eXdb) via a secure connection, where it is compared to the fingerprints of other checked e-mails. A predefined degree of similarity is sufficient to assign the e-mail to a certain mailing type. This approach prevents randomly generated text or images contained in the e-mail from influencing spam detection.
This method is used to determine whether the e-mail in question is a bulk e-mail. If this is not the case, the e-mail is categorized as “clean.” Bulk e-mails are subjected to additional inspections in which legitimate bulk e-mail (e.g. newsletters) are reliably differentiated from undesired bulk e-mail (e.g. spam). The inspection and delivery are conducted without noticeable delay.
Functionality of the
The advantages of eXpurgate spam detection:
The bulk e-mail criterion securely prevents individual messages from being incorrectly categorized as spam, thereby eliminating the risk of losing business-related e-mails (Zero False Positives®). eXpurgate’s false-positive rate is less than 0.00001%.
eXpurgate spam detection doesn’t access e-mail content for spam inspection. The fingerprint is irreversible and does not allow for any type of interference with the e-mail’s content. This allows the eXpurgate technology to uphold the highest possible degree of confidentiality and data protection.
eXpurgate spam detection continues to stand out as it is completely maintenance-free; unlike content- or reputation-based checks, the technology never needs to be updated or readjusted based on threat levels.