How to send a newsletter from Microsoft 365

Microsoft 365 already sends your everyday email from your own mailbox and domain. A newsletter tool that works the same way keeps that trusted sender identity, instead of routing your campaigns through a shared marketing IP. This guide shows how to send a newsletter from your own Microsoft 365 mailbox with SimpleNewsletter365.

Before you start, you need a Microsoft 365 business subscription with a mailbox you can send from (your own or a shared mailbox), and permission to sign in and authorize the app for your organization. Personal Microsoft accounts are not supported.

Related guides

• Microsoft 365 email sending limits explained
• Set up SPF, DKIM, and DMARC for Microsoft 365
• How to send a newsletter from a shared mailbox in Microsoft 365

Sources

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

Step by step

1. Sign in with Microsoft. Sign in to SimpleNewsletter365 with your Microsoft 365 work account. There is no new password and no separate sending domain to set up.
2. Connect your sending mailbox. Authorize the mailbox you want to send from, either your own mailbox or a shared mailbox. SimpleNewsletter365 sends through it using Microsoft Graph, from your real address and domain.
3. Add your contacts. Import a CSV of your audience or add contacts manually. Contacts are unlimited on every plan, and you can group them into segments for targeted sends.
4. Write and preview your newsletter. Compose your newsletter in the editor, add your branding, and preview how it looks. Add a custom domain if you want branded tracking links and click analytics.
5. Send or schedule. Send now or schedule for later. Sending is paced to stay within Microsoft 365 per-mailbox limits, and you can watch delivery, bounces, and clicks in reports.

Frequently asked questions

Can I send a bulk newsletter directly from Outlook?

Outlook in Microsoft 365 is built for regular email, not bulk newsletters, and Microsoft enforces per-mailbox sending limits. A newsletter tool like SimpleNewsletter365 sends through your Microsoft 365 mailbox using Microsoft Graph while pacing within those limits and adding list management, unsubscribe handling, and reporting.

Do I need a separate sending domain?

No. You send from your own Microsoft 365 mailbox and domain, so your newsletters use the sender reputation your organization already has. A custom subdomain is optional, only for branded tracking links.

What are the Microsoft 365 sending limits?

Microsoft 365 allows about 10,000 recipients per day per mailbox and 30 messages per minute, with a per-message recipient limit. See our guide to Microsoft 365 email sending limits for the details.