How to manage Jellyfish rules

This article describes how to create and manage blocklist and acceptlist rules through the Jellyfish spam filter. 

How to create blocklist rules 
Email rule  
Domain rule 
Subject rule 
Advanced rule 
How to create Acceptlist rules 
How to manage existing rules 

How to create blocklist rules

The blocklist feature allows you to add individual rules for blocking specific emails/domains/subjects you don't want to receive in your inbox. It's also possible to enable, disable, and remove rules in bulk.

To create a new rule, click on the Create a new rule button on Blocklist tab:


After that, a pop-up window with the respective blocklist options will appear:
  • Email: restrict a specific email address.
  • Domain: block particular domain names.
  • Subject: block a specific topic or exact phrase.
  • Advanced: create multiple sets of conditions to block emails.

Choose the type of rule you wish to create,  click on its icon and press Next to proceed:


Email rule

If you need to restrict a specific email address, select the Email option and the Block an email address window will appear with two fields: 
  • Your email address: enter your mailbox you wish to protect from unwanted email address.
  • Sender's email address: enter the email address you wish to restrict receiving emails from.

Fill in the required fields and click Create Rule:


If you receive “The email address is not valid. Please enter again.” make sure there are no invalid symbols or special characters at the end or at the beginning of your email address or that it doesn't appear consecutively two or more times.


Domain rule

If you need to block a specific domain from which (all mailboxes existing for it) the emails are coming , select the Domain option. Once you’ve done this, the Create domain rule window appears with two fields: 
  • Your email address: enter the email address you wish to protect.
  • Sender's domain name: enter the domain name you would like to block.

Fill in the required fields and click on Create Rule:

Subject rule

If you want to block emails with certain subjects choose the Subject option. Once done, you will see the Leave out these subjects window with two fields: 
  • Your email address: enter the email address you wish to protect.
  • Restricted subject: enter a word, exact phrase or the whole subject that you wish to block.

Fill in required fields and click Create Rule:

Advanced rule

NOTE: The Advanced rule only applies if all conditions are met.

If you need to create a rule with multiple different types of conditions (for example, combining email and subject types if you don't want to receive specific subjects from some email address and not all emails from that email address), you can do so by selecting the Advanced option. Once you’ve done this, you’ll see the Compose an advanced rule window with four fields:
  • Your email address: enter the email address you wish to protect.
  • Select your conditions: select one or several conditions under which the rule should be applied to a message.

The Filter Objects sets the following conditions:
  • Subject
  • From
  • To
  • Sender IP address
  • Envelope-To
  • Envelope-From
  • Message body

And operators for them include:
  • Is
  • Is not
  • Contains
  • Does not contain
  • Starts with
  • Ends with
Envelope-From/To means the actual email address the email is sent to/from mentioned in email headers. This may be helpful when identifying the real sender of the email to avoid scam or fraud.You can check how to analyze email headers here.

In the remaining filed insert the trigger word, phrase, email address or IP and click on Create Rule:

To add more rules, simply click Add condition and to remove one click the Trash icon:

It may not be obvious how to properly use FROM/TO conditions with IS operator. From a technical standpoint FROM condition with IS operator means total match with the FROM field in an email (i.e. the whole string). It usually contains sender's name/company name + mailbox in < >. If you just put the sender's mailbox in the field such rules won't work. See the example of the correct use below:

If you need to block/accept emails from specific TLDs, it's possible to achieve this by creating this type of advanced rule:
Filter Object: Envelope from;
Condition: ends with;
Input field: .tld (for example, .ru, .net, etc).

See the example of the correct use below:

Once a rule is created, you’ll see a confirmation message at the top of the page:


How to create Acceptlist rules

Think of the Acceptlist as an inverted Blocklist. It allows you to whitelist some specific emails, domains, and subjects in order to make sure you always receive them.
On the Acceptlist tab, you can perform the following actions: 
  • Check the list of the rules created (if there are any)
  • Modify them
  • Enable/disable and delete rule(s)
Similar to blocklist rules, it's possible to enable, disable and remove acceptlist rules in bulk. Here you can check the types of whitelist rules:

Remember that the process of creating and managing acceplist rules is the same as for the blocklist

How to manage existing rules 

Existing rules can be:
  • Enabled or disabled by switching the toggle on/off:

  • Modified by clicking the Pencil icon:

  • Deleted by clicking the Trash icon:

Please note:
  • You can only set the rule for one email address at a time. If you need to create rules for several mailboxes, it needs to be done individually for each mailbox.
  • If you don't input the mailbox, Jellyfish will automatically assign this rule to all the mailboxes existing for that domain.
  • Creating a new rule will cancel out a previously set blocklist or acceptlist rule which applies to a message.


Settings option allows to disable and enable Jellyfish filtration in the Jellyfish interface. Global blocklists will get disabled as well after you turn off Jellyfish, so you will receive all the emails sent to your email address.

When the filtration is disabled, you will see the following warning messages that suggest enabling the filtration:

NOTE: Once filtration is disabled, it is not possible to create, add or edit blocklist/acceptlist rules. It is needed to enable filtration in order to do that.

That's it!
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