Open a Daily Digest email. You will see that the spam filter (Greymail) organizes messages into three zones, designated as green, yellow and red. [If you don't have a Daily Digest email to open, you can login to the spam filter by entering your email address and password here.]
The green zone is likely to contain many messages you want, such as promotions or newsletters you've subscribed to and email from social media sites. (If you previously used tabs in CFU webmail when it was hosted by Google, these messages would most likely have landed in your Promotions, Social or Updates tab.)
The yellow and red zones contain mail with some type of hazardous characteristic. Red is for the most suspicious messages.
Within each zone (green, yellow and red) you have four choices for how incoming messages will be handled:
Allow - Choose this setting if you want messages for this zone to all be automatically sent to your inbox.
Markup - Choose this setting if you want messages for this zone to be sent to your inbox with a *JUNK* designation in the subject line.
Quarantine - this is the default setting for each zone. Leave this in place if you want messages of this type to land in the Greymail filter, where you can individually allow them. Quarantined messages will be permanently deleted after 35 days.
Block - choose this setting if you want messages within this filter zone to be rejected and permanently deleted. This means you will never see these messages anywhere.
The directions below show how to change the setting for each zone.
Open your daily digest email and click My Account.
You will see the Greymail homepage pictured below. Click the Policies Tab.
With the Policies tab selected, click the dropdown menu icon to the left of the words Filter by Message Type. Then click the dropdown menu icon to the left of the words Green Zone to reveal the menu of choices for this zone. The choices in the dropdown menu for each zone are:
These options are explained at the beginning of this help article. Select the option that you want to apply for this zone. Then do the same for the yellow and red zones.
4. You can also block or allow messages by sender, rather than by zone. Use the Filter by Sender dropdown menu to do that.