You set up a shared mailbox from the Settings menu (the gear icon) under Shared Mailboxes. A shared mailbox connects the same way as a personal one, with Google (OAuth) or IMAP and SMTP, but it is not tied to a single person. Instead, everyone on your account who holds the right mailbox permissions can read and reply, which makes it ideal for a support, sales, or info address that a whole team works from.
Where shared mailboxes are set up
Open the Settings menu (the gear icon) in the top toolbar and choose Shared Mailboxes. This screen lists every shared mailbox in the account, with its provider, status, and last sync time. Creating a shared mailbox is an administrative action, so you need the permission to manage them. To begin, select the Add Shared Mailbox button.
Create a shared mailbox with Google OAuth
Use Google for a Gmail or Google Workspace team address. The connection is authorized on Google, so no password is stored in ISO Mate.
- Open the Settings menu, then choose Shared Mailboxes.
- Select Add Shared Mailbox.
- Set the Provider field to Google (OAuth).
- Select Connect Google Account, then sign in and grant access in the popup.
- ISO Mate returns to Shared Mailboxes and begins the first sync.
Create a shared mailbox with IMAP and SMTP
For a team address on Outlook, Yahoo, or a company server, use the IMAP/SMTP provider and enter both the receiving and sending settings.
- Select Add Shared Mailbox, then set the Provider field to IMAP/SMTP.
- Enter a Display Name and Email Address for the shared address.
- Under IMAP Settings, enter the host, port, encryption (SSL, TLS, or None), username, and password.
- Under SMTP Settings, enter the host, port, encryption, username, and password.
- Save with the Add Shared Mailbox button, then open the saved mailbox and select Test Connection to confirm it works.
The setup screen lists common values for reference, such as Gmail on imap.gmail.com port 993 (SSL) and smtp.gmail.com port 587 (TLS). Providers with two-factor authentication usually require an app password instead of the normal login password.
Who can access a shared mailbox
Shared mailboxes do not have a per mailbox member list. Access is governed by roles and permissions, so any user in your organization who holds the appropriate mailbox permissions can open the shared mailbox and work its messages. To change who has access, adjust the relevant role in Roles & Permissions rather than editing the mailbox itself.
Add signatures for the team
After a shared mailbox is saved, open it again and select Manage Signatures to create one or more shared signatures for consistent branding. See managing email signatures for the full workflow.
With the shared mailbox connected, your team can compose, reply, and forward messages and use the email activity panel to link messages to help desk tickets. For a private account, see connecting a personal mailbox.
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