How to send a newsletter from a shared mailbox in Microsoft 365

A shared mailbox such as newsletter@company.com lets a whole team send under one identity, instead of from a single person’s address. Because SimpleNewsletter365 sends through your own Microsoft 365 mailbox, it can send newsletters from a shared mailbox just as easily as from a personal one. This guide shows how.

Before you start, an administrator needs to create the shared mailbox in Microsoft 365 and grant your account Send As or Send on Behalf permission for it. SimpleNewsletter365 requires a Microsoft 365 business subscription. Personal Microsoft accounts are not supported.

Related guides

• How to send a newsletter from Microsoft 365
• Microsoft 365 email sending limits explained
• How to improve newsletter deliverability on Microsoft 365

Sources

• Microsoft 365 outbound sending limits (Microsoft Learn)
• SimpleNewsletter365 pricing

Step by step

1. Confirm shared mailbox access. In Microsoft 365, make sure the shared mailbox exists (for example newsletter@company.com) and that your account has Send As or Send on Behalf permission for it, granted by an admin in the Microsoft 365 admin center.
2. Sign in with Microsoft. Sign in to SimpleNewsletter365 with your Microsoft 365 work account and authorize the app for your organization.
3. Select the shared mailbox as your sender. Connect the shared mailbox as the sending mailbox. SimpleNewsletter365 sends through it over Microsoft Graph, so newsletters go out from the shared address and your domain.
4. Invite your team. Add teammates and assign roles so several people can prepare and send from the same shared mailbox, with a clear audit trail.
5. Send or schedule. Compose, preview, then send now or schedule. Sending is paced to stay within the shared mailbox's Microsoft 365 limits, and delivery and clicks appear in reports.

Frequently asked questions

Can multiple people send from one shared mailbox?

Yes. A Microsoft 365 shared mailbox lets a team send from a single address such as newsletter@company.com. In SimpleNewsletter365 you invite teammates and assign roles, so several people can prepare and send from that shared identity.

What permission do I need on the shared mailbox?

You need Send As or Send on Behalf permission for the shared mailbox, granted by a Microsoft 365 administrator. With that in place, SimpleNewsletter365 can send newsletters through the shared mailbox on your behalf.

Do sending limits apply to shared mailboxes?

Yes. Microsoft 365 sending limits apply to the mailbox used to send, including shared mailboxes. SimpleNewsletter365 paces sends to stay within them. See our guide to Microsoft 365 email sending limits.