Should you choose a shared mailbox or a distribution list?
Choose a shared mailbox when colleagues need to work from the same inbox and reply using a team address. Choose a distribution list when the aim is to send a message to several people in their own inboxes. Start with how your team handles the work, rather than the name you want on the email address.
This shared mailbox vs distribution list guide is for business owners planning addresses such as enquiries, accounts or staff announcements in Microsoft 365. It covers the choice and the handover checks, rather than a full administrator setup procedure.
The practical difference for your team
Microsoft describes distribution groups as a way to send notifications to a group of people, and shared mailboxes as a way for several people to access one mailbox. Its comparison of Microsoft 365 group types also distinguishes Microsoft 365 Groups, which support wider collaboration such as shared files and planning.
- Shared mailbox suits a team handling incoming requests together.
- Distribution list suits announcements delivered to a defined audience.
- Microsoft 365 Group is worth considering when the requirement includes shared conversations, files and other collaboration tools.
Neither a shared address nor a list of recipients establishes who owns a customer request. Agree who checks incoming messages, how colleagues claim work and what happens during holidays before choosing the configuration.
When a shared mailbox makes sense
Consider a small office where two people answer sales enquiries. Each needs to see the incoming message and know whether somebody has replied. A shared mailbox can give them a common place to work, with appropriate permission to reply from the business address.
This is an illustrative workflow, not a KByte client case study. The useful question is whether the team needs a shared record of the conversation. If colleagues currently forward messages back and forth asking who has answered, review the process as well as the mailbox.
For shared mailbox email management, write down a simple rule for each stage:
- Who checks new requests and how often during your agreed working hours?
- How does a colleague indicate that they are handling a message?
- Where are completed conversations kept?
- Who provides cover when the usual person is away?
- When should a request move into a ticketing or customer-management system?
A shared inbox does not automatically provide case assignment, service deadlines or reporting. If those are central to the job, define them before treating email as the whole solution.
When a distribution list is the better fit
A distribution list for staff announcements is useful when recipients need their own copy of an update. Examples include an office closure notice or a reminder to a department. It is less useful as the sole place to coordinate a customer enquiry that needs one accountable reply.
Decide who may send to the list and who maintains its membership. Microsoft documents that external senders can be allowed through administrator configuration, so do not assume an address will accept customer email just because internal announcements work.
Ask whether every recipient needs each message. A large list can create unnecessary mail, while an outdated list may leave out the person who actually needs the information. Give membership reviews a named owner.
Check access, licensing and reply visibility
Microsoft’s shared mailbox guidance says users access the mailbox through their own licensed Exchange Online mailboxes. The shared mailbox account should remain blocked from direct sign-in. Give people individual access rather than distributing a common password.
A shared mailbox can hold up to 50 GB without a separate mailbox licence. Larger storage and some archiving, hold or advanced features need additional licensing. Check the actual requirements with your administrator before removing or buying licences.
Reply visibility also needs attention. Microsoft’s shared mailbox settings guide explains that sent messages are saved in the sender’s Sent Items by default. An administrator can enable copies in the shared mailbox. Verify the result with the Outlook clients your staff use; access to incoming mail alone does not establish that everyone can see outgoing replies.
If access is changing because someone is leaving, use the separate Microsoft 365 offboarding checklist. Choosing a team mailbox does not replace the wider leaver process.
A checklist before changing a business email address
Before an administrator changes an existing address, record what it does today. Include website forms, automatic replies, forwarding, rules and applications that use it. Agree how existing messages will be preserved and how staff will work during the change.
- Describe the outcome. Write whether the address broadcasts information or receives work that needs a response.
- Name the owner. Assign responsibility for membership, access reviews and day-to-day cover.
- List dependencies. Check website forms, customer records and any software that sends to or from the address.
- Agree the change plan. Confirm the timing, history to retain, required permissions and recovery route.
- Test with authorised participants. Check incoming delivery, the visible sender on a reply, sent-message visibility and access from the clients staff actually use.
- Hand over the working rules. Explain who handles new requests and how to report a missing message or access problem.
Where a website feeds enquiries into the address, the website enquiry integration guide covers the separate journey from form submission to follow-up. For a new company, include the decision in your business IT setup checklist.
Get help choosing a workable email process
KByte can help review the people, permissions and workflow behind your business email through our IT helpdesk service. Remote support is available across the UK, with onsite support in Peterborough where needed and agreed.
Tell us what your team needs the address to do, how many people use it and where the current process breaks down. Consultancy is always free of charge. Configuration, migration, licences and ongoing support are quoted or agreed separately before paid work begins.