Authentication

[email protected] - Mails sent from webmail, mail client, or scripts with authentication
[email protected] - scripts without SMTP authentication
user - Without any authentication

Spam Filtering Details
Rule Description
:8 Top-level URL fingerprinting Algorithm - Full URLs are checked
:9 Checks the message body chunks against similar known spam.
:10 Library of specifically known regex in body/subject <- These will have names following them that describe the match type. Do not share specific names with customers.
:14 Virus in the binary file.
:18 Known spam image files.
:19 Large fixed strings from known spam.
:20 Multi-level URL Fingerprinting Algorithm.
:21 Chunks of the message body.