|Email Submission||Definition||Submission Method||User Consideration for Submitting|
|Spam/Phish||Unsolicited and undesired. Spam/Phish is never legitimate and may also be malicious (phish, virus, malware, scams, etc.)||Delivered to the user’s inbox, but user considers message to be spam or Phish.|
|Legitimate||Legitimate (good) email, not spam. Also known as ‘Ham.’||
||Detected as spam, but user considers message legitimate|
|Marketing / Graymail||
Marketing is legitimate (not Spam) email that is commercial bulk email. Usually subscription based, sometimes unwanted.
Users may have knowingly or unknowingly solicited mail from the sender. For example swiping a badge at a conference or making an online purchase, etc. Legitimate subscription based marketing email will have a working unsubscribe mechanism.
Graymail is a broader category that Includes Marketing as well as other legitimate bulk mail.
||Marketing/graymail messages not detected as marketing/graymail.|
|Not Marketing / Graymail||Legitimate email (not Spam) that is not bulk and not subscription based. Usually person-to-person and/or email@example.com||Detected as Marketing/Graymail, but user considers the message to be transactional or otherwise not Marketing/Graymail.|