Guide · Outlook
How to organize client emails in Outlook: folders, categories and rules.
When you work with several clients at once, the inbox turns into a mix of proposals, questions and meeting requests. This guide shows a simple system with Outlook's built-in tools, what works differently in the new Outlook, and where the system stops.
Pick one system and stick to it
Most inbox chaos doesn't come from too few folders. It comes from mixing methods: some clients have folders, some have categories, and some emails stay flagged in the inbox forever. Decide once how you organize and apply it to every client.
A combination that works for most consultants and account managers: folders answer “which client is this about?”, categories answer “what do I need to do?”, and search handles everything else.
1. One folder per client
Create a parent folder called “Clients” and one subfolder per client. Keep it flat: subfolders per project or topic sound tidy, but they make filing slower and searching harder. Use the client's name as it appears in your CRM or invoices, so colleagues recognize it.
When a client relationship ends, move the folder into an “Archive” parent folder instead of deleting it. You keep the history without cluttering your daily view.
2. Let rules do the filing
Create a rule per client that moves emails from that client's addresses into their folder. In Outlook, right-click an email from the client, choose Rules and create a rule based on the sender. Add further addresses from the same client to the rule over time.
One caveat: emails that are moved automatically never appear in your inbox, and urgent requests can go unnoticed. If that worries you, let the rule assign a category instead of moving the email, and file it yourself once it's handled. In the new Outlook for Windows, you can also run rules on existing folders, for example to clean up Sent Items or an old project folder.
3. Use categories for status, not for clients
Color categories are most useful when they say what needs to happen next. Three or four categories are enough:
To answer: you owe the client a reply.
Waiting on client: the client owes you a reply or a decision.
Commitment: the email contains something you or the client agreed to.
Prep: relevant for the next meeting.
4. Search with operators instead of scrolling
Outlook's search box understands operators. They find a client's emails in seconds, even across folders:
from:name or address, for emails from a contact
to:name or address, for emails you sent
subject:word, for a project name in the subject line
hasattachments:yes, for proposals and documents
Combine them, for example from:megan subject:rollout hasattachments:yes.
Search folders, which save a search and update automatically, are fully customizable in classic Outlook. In the new Outlook for Windows they are only partially available, and you can't yet build your own criteria. If you rely on them, keep classic Outlook for that task.
5. Flag sparingly
Flags help with individual follow-ups, but a list of 60 flagged emails is no longer a to-do list. Flag only what needs action this week, and clear flags as soon as the action is done. For anything longer-running, the “Waiting on client” category works better.
Where this system stops
Folders, rules and categories help you find emails. They don't tell you where a client relationship stands: what was agreed across ten threads, which questions are still open, or what the next step is. And your folders live in your mailbox, so a colleague who takes over the client starts from scratch.
That's the gap aenuma fills. You assign the relevant Outlook emails to a client engagement, and aenuma keeps a briefing with agreements, open questions and next steps, plus who owes what, each with its source. You can share the engagement with a colleague when you hand it over. See how it works on the Outlook emails by client engagement page.
Checklist: client email setup in 30 minutes
1. Create a “Clients” folder with one flat subfolder per active client.
2. Create an “Archive” folder for past clients.
3. Set up one rule per client, moving emails or assigning a category.
4. Create the four status categories: To answer, Waiting on client, Commitment, Prep.
5. Save the search operators above somewhere you can find them.
6. Once a week, clear flags and check the “Waiting on client” category.
Sources
Release notes for the new Outlook for Windows (running rules on any folder, search folder changes) and feature comparison of new and classic Outlook. Outlook changes frequently; menu names can differ slightly between versions.
By Joshua Schütt. Last updated: October 2026.
From organized emails to a clear status
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