Shared Inbox vs. Personal Email: Choose the Right Access Model

Use a personal mailbox when one person owns the address, Gmail delegation when that owner needs named delegates to act inside it, and a Microsoft 365 shared mailbox when an organization owns a common address and can administer its members. None of these models automatically creates a fair assignment queue, and Flick does not claim to provide shared-inbox administration or team assignment.

Verification note: This is a documentary guide checked against current sources on October 13, 2026. We did not hands-on test the named product or workflow during this review, so claims are limited to the cited documentation. Interfaces can vary by account, region, rollout, and app version.

“Shared inbox” is often used as a catch-all for several different arrangements. A person might share access to their own Gmail account, or an administrator might create a separate support@ mailbox for a team. Those arrangements differ in who owns the address, who can change or delete messages, and what a recipient sees in the From line.

This is a documentary comparison of provider-documented controls, not an IT, employment, legal, records-management, or security assessment. Your organization’s administrator and retention policy take priority. The provider pages below were checked on 2026-10-13; limits, menus, and licensing can change.

The decision at a glance

Model	Who owns the mailbox	Permission model	Sender identity	Assignment reality
Personal mailbox	One person owns the account and address	The owner controls access; other people need an explicit provider-supported grant	The mailbox owner’s identity is the default	Personal labels, tasks, or a separate team process are needed
Gmail delegation	The account owner keeps the Gmail account; one or more delegates receive access	Delegates can read, send, and delete mail in the owner’s account; the owner can remove the grant	Google documents that the delegate’s address appears when they send from the owner’s account	Delegation grants authority, not a shared queue or an assignee state
Microsoft 365 shared mailbox	An organization owns a common address such as support@	An administrator adds members and assigns Full Access, Send As, or Send on Behalf	Replies can appear from the shared address or identify the person sending on behalf of it	Membership grants access; a separate triage convention must assign each conversation

The table is a starting point, not a promise that every client exposes the same controls. Read the provider’s current permission screen and your organization’s policy before granting access.

Choose a personal mailbox when one person owns the work

A personal mailbox is the clearest fit when the address belongs to one person and that person is responsible for the decisions made from it. It keeps ownership, recovery, retention, and sender identity close to the same account boundary.

Choose this model when:

• replies should come from one person’s address;
• the account owner should approve every access grant;
• the work is private to one person rather than a standing team queue; or
• the organization already has a separate case, ticket, or assignment system.

Do not treat a personal mailbox as a shared workflow merely because several people can see a forwarded copy. Forwarding creates another data route and can obscure which account is authoritative. The separate work and personal email guide covers the identity and policy boundary; manage multiple email accounts covers the operating routine.

If another person genuinely needs to act in the mailbox, use a provider-supported grant with an accountable owner. Do not share the password or make a second copy of the mailbox just to simulate assignment.

Choose Gmail delegation when the owner should remain the owner

Gmail delegation adds another person’s access to an existing Gmail account. Google’s help documentation defines a delegate as someone who can read, send, and delete email in the owner’s account. Google’s Gmail API documentation describes the delegator and delegate relationship and says the delegate’s email address appears when the delegate sends a message from the delegator’s account.

That makes delegation useful when an executive, assistant, or support colleague needs to work inside a real owner’s mailbox without taking ownership of the account itself. The owner should still decide who is authorized, what the delegate may do, how the access is reviewed, and how it is removed. Account type and organization policy affect who can be added and which limits apply; check the live admin controls rather than relying on a remembered limit.

Delegation is not the same thing as a new shared address:

• the underlying Gmail account remains the owner’s account;
• the provider grants mailbox actions, not a neutral case-ownership record;
• a delegate may be able to read, send, and delete, so “view only” should not be assumed; and
• a team still needs a visible convention for who is handling each conversation.

Google’s Delegate & collaborate on email guide explains the invitation, access, removal, and account-specific behavior. Its Gmail API delegation guide documents the API relationship and the actions available to delegates.

Before using delegation, confirm the account owner, the permitted delegates, the sender identity that recipients should see, and the process for removing access when someone changes role. Record that decision in your email account inventory, and review the permission again after a role or policy change.

Choose a Microsoft 365 shared mailbox when the address belongs to the organization

Microsoft 365 shared mailboxes are designed for a group that monitors and sends from a common address, such as a support or information mailbox. Microsoft says an Exchange administrator creates the mailbox and adds members. It also distinguishes the permissions instead of treating “access” as one undifferentiated grant:

• Full Access lets a member open the mailbox and read, change, and delete items, but does not by itself grant sending permission.
• Send As makes a message appear to come from the shared mailbox.
• Send on Behalf identifies the individual as sending on behalf of the shared mailbox.

Microsoft’s Create a shared mailbox documentation describes these grants and the administrator workflow. Its About shared mailboxes guide notes that shared mailboxes are intended for people inside the organization, are not intended for direct sign-in, and have storage, licensing, and user-count considerations.

This model fits a durable organizational identity: the address should survive a staff change, several members need access, and an administrator can manage the membership and sending rights. It still does not decide which member owns the next reply. Use a ticketing system, CRM, documented rotation, or another explicit assignment method when accountability matters.

Compare the permission and sender questions before you connect anything

Ask these questions in order:

1. Who owns the address? Is it a person’s mailbox, or an organization-owned address that should survive a role change?
2. Who can read and change messages? Separate read, modify, delete, and send authority. Full Access or Gmail delegation can be broader than a person expects.
3. What should recipients see? Decide between a person’s address, a shared address, or an explicit “on behalf of” identity before the first reply.
4. Where is assignment recorded? Provider access is not proof that a conversation has an assignee. Name the system or convention that records ownership, handoff, and escalation.
5. Who can grant and revoke access? Confirm the administrator or account owner, the removal path, and how quickly a role change takes effect.
6. What policy controls the data? Check retention, legal hold, export, audit, device, and offboarding requirements before copying or forwarding organizational mail.
7. Does the next tool support this authority model? A mail app that can process an account is not automatically a shared-mailbox manager, delegation administrator, assignment system, or records archive.

For a third-party mail app, read the requested scopes and account binding before authorization. The OAuth permissions guide explains why a provider grant is not the same as a vendor’s storage or deletion policy. The email app security checklist covers tokens, logs, retention, revocation, and support access. For any write-capable client, how email apps verify actions explains why a visible card disappearing is not proof that the provider committed the intended action.

Where Flick fits—and where it does not

Flick is not a shared-mailbox administrator, delegation setup tool, or team assignment queue. This guide does not claim that Flick can create a shared mailbox, provision Gmail delegates, assign conversations to coworkers, or reconcile a team’s ownership process.

The sample demo at app.flicked.email uses fabricated messages and cannot connect to, read, or change a real mailbox. Flick's connected product supports an individual Google Gmail account that you personally control. It does not support delegated, shared, team, or alias mailboxes; do not connect one even if your organization permits access. For a supported personal account, review the requested permissions and your organization's data-handling policy before connecting.

Bottom line

Pick a personal mailbox when one person owns the address and decisions. Pick Gmail delegation when the owner remains accountable but named delegates need to read and act in that account. Pick a Microsoft 365 shared mailbox when an organization owns a common address and an administrator can manage members and sender permissions.

In all three cases, access is not assignment. Make the owner, sender identity, permission scope, handoff, and revocation path explicit before another person—or another app—touches the mailbox.