How To: Manage your SPAM in Zimbra (instead of Greymail)
This guide will walk you through the process of minimizing SPAM and Attachment filtering that is done in the external SPAM system. Additionally, the guide will walk you through configuring the service so that SPAM is delivered to the Spam folder in your webmail client with the label "SPAM" prepended to the subject line. Further, we will set up the Spam folder to automatically delete messages 30 days after they arrive.
NOTE: By performing these steps, you are setting the SPAM Quarantine service to no longer quarantine any messages, and to deliver regardless of their danger level and risk to you or your computer. You should be suspicious of every message marked as SPAM by this system and only click links, view images or open attachments from people you trust who are sending email that they would logically send.
Part One: Change the spam filters to Tag (Markup) and Deliver
Step 1. Log into the SPAM Console at https://greymail.redcondor.net/console
Step 2. Select the Policies tab to open the Filter by Messages Type controls
Step 3. Click the down arrow next to Red Zone - Potentially dangerous mail to edit delivery options.
Note - By allowing potentially dangerous email to be delivered to your mailbox you are intentionally removing a service designed to protect you from content that if opened could expose you to phishing or links to other sites that might deploy malicious code to your computer. Perform this only if you understand the risks and are willing to manage them yourself.
Step 4. Click the drop down next to each of the Potentially dangerous mail types and select Markup
Note: For the purposes of this guide and to simplify the final steps, it is recommended that you set the Subject Tag to SPAM: (use this same value for all Markup items in all zones)
Step 5. Click the down arrow next to Yellow Zone - Suspicious mail to edit delivery options. The Foreign section should be empty, but the Attachment section will have a series of extensions that are known to be suspicious.
Note - Allowing suspicious attachments to be delivered to your mailbox and mail clients can expose you to malicious files that may damage your computer or assist others with stealing your information. Perform this only if you understand the risks and are willing to manage them yourself.
Step 6. Click on the first file type in the list, then shift+click on the last Extension in the list to select all
Step 7. Right click in the highlighted area and select Set Markup Text
Step 8. In the popup enter, SPAM: then press OK
Step 9. Click the down arrow next to Green Zone - Junk mail to edit delivery options
Step 10. Similar to the Red Zone steps, select Markup from the drop down for Junk, and then set the Subject Tag to SPAM:
Part Two: Set up Zimbra to deliver SPAM to the Spam folder and delete after 30 days
Step 1. Log into your webmail at webmail.gorhamtel.com
Step 2. Select the Preferences tab and then select Filters in the left column
Step 3. Click on Create Filter to bring up the Add Filter dialog box and complete as below:
Set Filter Name to SPAM Filter
If any of the following conditions are met:
Subject contains SPAM:
Move into folder Junk
Enable Do not process additional filters
Step 4. Click OK
Congratulations, your Spam Filter is now set up! Greymail will no longer quarantine any further emails, and all junk, suspicious or potentially dangerous email will be delivered to your Spam folder in Zimbra.