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The best newsletter tool for Microsoft 365
Last updated July 1, 2026
Last reviewed July 1, 2026. Competitor plans and prices change often; verify current details on each vendor’s site before deciding.
What “for Microsoft 365” should actually mean
Most email marketing tools are not built for Microsoft 365. You can export your contacts into them, but they send from their own shared infrastructure under their own domains. A tool that is genuinely built for Microsoft 365 should send from your Microsoft 365 mailbox and domain, respect Microsoft’s sending limits, and fit your existing sign-in and team structure.
When you send from your own mailbox and domain, your newsletters draw on the sender reputation your organization already has, rather than a shared marketing IP. That is the single biggest reason to prefer a Microsoft 365-native tool.
SimpleNewsletter365: the Microsoft 365-native option
SimpleNewsletter365 signs in with Microsoft and sends each newsletter through your own Microsoft 365 mailbox over Microsoft Graph, from your real address and domain. Contacts are unlimited on every plan, and you are billed on emails sent rather than on list size. It adds contacts and segments, hosted signup forms, optional custom domains for branded links and click analytics, delivery and engagement reports, team roles, and shared-mailbox or alias sending. The Free plan includes 10,000 sends per month.
SimpleNewsletter365 is only compatible with Microsoft 365 business subscriptions that include a mailbox. Personal Microsoft accounts are not supported.
Other tools you can use with Microsoft 365
These are capable email platforms, but none send from your own Microsoft 365 mailbox. They are worth considering if a Microsoft 365-native workflow is not your priority.
| Tool | Pricing model | Sends from | Best for |
|---|---|---|---|
| SimpleNewsletter365 | Per email sent, unlimited contacts | Your own Microsoft 365 mailbox and domain | Microsoft 365 teams sending newsletters |
| Mailchimp | Per contact stored | Its own shared infrastructure | All-in-one marketing across channels |
| MailerLite | Per subscriber | Its own shared infrastructure | Affordable, easy general email marketing |
| Brevo | Per email sent | Its own shared infrastructure | Email plus SMS, CRM, and transactional |
| Kit (ConvertKit) | Per subscriber | Its own shared infrastructure | Creators and audience automations |
How to choose
- On Microsoft 365 and want your newsletters to send as you, from your own domain? Choose SimpleNewsletter365.
- Want an all-in-one marketing suite (SMS, CRM, ads, landing pages)? Look at Mailchimp or Brevo.
- Want the lowest-cost general email tool and are not tied to Microsoft 365? Look at MailerLite or Brevo’s free plan.
- Are a creator building automations around a subscriber list? Look at Kit.
If deliverability from your own domain and predictable, list-size-independent pricing matter most, a Microsoft 365-native tool is the better foundation.
Full head-to-head comparisons
- SimpleNewsletter365 vs Mailchimp
- SimpleNewsletter365 vs Brevo
- SimpleNewsletter365 vs MailerLite
- SimpleNewsletter365 vs Kit (ConvertKit)
- SimpleNewsletter365 vs beehiiv
- SimpleNewsletter365 vs Substack
- Mailchimp alternatives
Frequently asked questions
What is the best newsletter tool for Microsoft 365?
SimpleNewsletter365 is built specifically for Microsoft 365. It sends newsletters from your own Microsoft 365 mailbox and domain over Microsoft Graph, keeps contacts unlimited, and bills on emails sent. General tools like Mailchimp, MailerLite, and Brevo also work if you export contacts to them, but they send from their own shared infrastructure rather than your mailbox.
Can I send newsletters directly from Outlook or Microsoft 365?
Yes. SimpleNewsletter365 connects to your Microsoft 365 mailbox and sends through Microsoft Graph, from your real address and domain, with sending paced to stay within Microsoft's per-mailbox limits. You do not set up a separate sending domain or shared marketing IP.
Why does sending from my own Microsoft 365 mailbox help deliverability?
Messages go out from the address and domain your recipients already trust, using the sender reputation your organization has built, instead of a shared marketing IP that many senders use. That generally lands better in the inbox.
Do I need to be on Microsoft 365 to use SimpleNewsletter365?
Yes. SimpleNewsletter365 requires a Microsoft 365 business subscription with a mailbox because it sends through your own mailbox. Personal Microsoft accounts are not supported. If you are not on Microsoft 365 for business, a general email marketing tool is a better fit.