Outlook rules not working on macOS

Hi @Troy Murray,   

Welcome to the Microsoft Q&A forum.   

Thank you very much for reaching out regarding Outlook rules. I appreciate your patience and the details you provided. 

Below is a short explanation of what’s happening, followed by step‑by‑step guidance for Outlook, plus a couple of workarounds. 

A - What’s likely happening  

1/ Rule order & “Stop processing more rules” 

Outlook processes rules top‑to‑bottom, and by default “Stop processing more rules” is turned on. That means once one rule matches, Outlook won’t evaluate the rules below it, even if they also match. This is often why adding a second condition or a second rule appears to break the setup. 

2/ How Outlook interprets multiple conditions/keywords 
In a single rule, different condition types are evaluated with AND (e.g., From AND Subject contains). 
However, if you add multiple phrases in the Subject condition, those phrases are evaluated as OR (any single match triggers the rule), which can cause unexpected matches or misses.  

3/ macOS-specific behavior (server-side rules only) 
The new Outlook supports server-side rules only; classic client-side rules are no longer available.  

B - Recommend next steps 

You may try create two separate rules and putting them in the right order: 

Rule A (HIGH): 

Condition(s): 

• From = the specific sender (or domain) 
• Subject includes = High ticket (add other exact variants if needed) 

Action: Move message to High folder 

Stop processing more rules: On (default on Mac) 

Order: Place this rule above the Medium rule 

Rule B (MEDIUM): 

Condition(s): 

• From = the same sender 
• Subject includes = Medium ticket 

Action: Move message to Medium folder 

Stop processing more rules: On 

Order: Below the High rule 

To do this in Outlook, please:  

• In Outlook menu > Settings > Rules > + Add new Rule > set the Conditions and Action as above. 
• Use the up/down arrows in the Rules window to ensure High is above Medium. 
• By default, Stop processing more rules is enabled per rule; keep it on so each message is routed once to the correct folder. 

If the subject text can vary (e.g., “High priority ticket”, “Ticket - High”), add those as additional Subject includes entries inside the High rule. Please remember: multiple entries inside Subject includes act as OR for that condition. 

Also, you can also set up the same High/Medium rules in Outlook on the web, since server‑side rules there sync consistently across all devices. 

Quick test to confirm:

1. Send yourself two messages from the target sender with subjects: 
   • High ticket - test 
   • Medium ticket - test 
2. Verify the High message lands in High, and Medium in Medium. 
3. If one doesn’t move, double‑check the rule order and that “Stop processing more rules” is enabled for each rule. 

C - Power Automate (Advanced) 

For more advanced logic (branching, exceptions), you can also use Power Automate: trigger When a new email arrives (V3) and then Move email (V2) to the correct folder based on subject. This gives you full control and clear run history for troubleshooting. 

These official references may also help explain the behavior in more detail: 

• 'when a new email arrives (v3) - template 
• Overview of using Outlook and Power Automate - Power Automate | Microsoft Learn 
• Outlook Rules Limit: How Many Rules Can You Have? - Position Is Everything 

Please note that this information is being provided by the moderator solely for your convenience. The referenced sites are not managed or overseen by the moderator, and therefore we cannot guarantee the accuracy, security, or suitability of any software or content available there. We recommend reviewing all information carefully and ensuring you understand any associated risks before following suggestions from the provided link.   

In case you require more in-depth guidance or support for these steps, I’d recommend posting your query in the Microsoft Power Automate Community. This is a dedicated channel for Power Automate discussions. The reason I suggest posting a new topic there is that in the general Q&A Forum, resources and expertise on Power Automate are limited. In the Microsoft Power Platform Community Forum, you’ll find the most qualified group of respondents, and other partners who regularly read the forums can share their knowledge or learn from your interaction. 

  I hope this information is helpful. Should you have any further questions or need additional assistance, feel free to reach out.    

Thank you again for your understanding and cooperation. 

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In Outlook for Mac (new Outlook), only server-side rules are supported and they run on the Exchange server. Client-side rules and some complex combinations of conditions/actions that existed in classic Outlook are no longer supported, which is why a rule that works with a single condition may stop working when additional conditions are added.

To get the scenario working within these constraints:

1. Ensure the rule is a valid server-side rule
   • Outlook for Mac now supports only server rules; any rule must use conditions and actions that the server can evaluate. Conditions or actions that rely on client-only features will prevent the rule from working.
   • If a condition or action is not available in the rule editor, it is not supported for server-side rules in Outlook for Mac.
2. Create separate rules per severity instead of combining too much logic
   • Create one rule for “High ticket” subjects and another for “Medium ticket” subjects, each with a simple condition set that the server can evaluate:
     • Rule 1: Condition = From [specific sender] AND Subject contains "High ticket" → Action = Move to High folder.
     • Rule 2: Condition = From [specific sender] AND Subject contains "Medium ticket" → Action = Move to Medium folder.
   • Keep the conditions limited to what is offered in the Outlook for Mac rule UI so they remain server-side.
3. Check rule order and “Stop processing more rules”
   • In Outlook for Mac, rules are processed in order from top to bottom.
   • Place the High and Medium rules above any more general rules.
   • For each severity rule, consider leaving “Stop processing more rules” enabled so that once a message matches High or Medium, no later rule interferes.
4. If the rule still fails with multiple conditions
   • Because Outlook for Mac only supports server rules, and some combinations are not supported, a reliable workaround is to create and manage the rules directly in Outlook on the web or Outlook for Windows (classic), ensuring they are server-based. These server rules will then execute before mail is downloaded to Outlook for Mac.

There is no client-side workaround in new Outlook for Mac, since client rules are explicitly not supported; the practical workaround is to keep rules simple and server-compatible, or manage more complex rules via Outlook on the web/Windows so they run on the Exchange server.

References:

• Create a rule in Outlook for Mac
• The rule I created does not work
• Edit or fix a broken rule in Outlook