Send from the mailbox you already own
SimpleNewsletter365 delivers your newsletter through your Microsoft 365 mailbox and your own domain, so it lands in inboxes the way your everyday email already does. No "sent via" tag on your emails, no spam-folder surprises, no technical setup.
Sign in with Microsoft · no card · 10,000 sends free every month
Works only with Microsoft 365 business subscriptions.
Comparing options? See the best newsletter tool for Microsoft 365.
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Acme Monthly · what shipped in June
Hi there, here is everything new this month, plus a quick note on what is coming next...
Pricing that rewards growth
Stop paying for contacts you have not emailed
Most tools charge more as your list grows, even for the people who never open a thing. SimpleNewsletter365 bills on emails sent, so your whole audience costs nothing to store.
The old way
Billed by contacts
- Price climbs as your list grows
- You pay for inactive subscribers
- Cleaning your list saves money, so you hesitate to grow it
SimpleNewsletter365
Billed by sends
- Store unlimited contacts for free
- Pay for the sends you need, not for the size of your list.
- No per-contact fees, ever.
Why your mailbox
Your domain already has a reputation. Use it.
Newsletter platforms send your email from their own servers, and inboxes often treat that mail as suspect. SimpleNewsletter365 sends from your own work mailbox, so your newsletter inherits the trust your address already has, on every plan.
Send from your own mailbox
Newsletters go out from your real work address, so they land in inboxes like your everyday email instead of a marketing blast, on every plan.
Unlimited contacts, always
Store your entire audience at no cost. You are billed on the emails you send, never on list size, so growing your list never grows your bill.
Branded links on your own domain
Add a custom domain so tracking links and short URLs carry your name, not ours, and every click report stays branded as your own.
Delivery and click reports
See delivered, bounced, and unsubscribed for every send, and add a custom domain to unlock click analytics on every link you share.
Bring your team
Invite teammates on Growth and up, send from a shared mailbox or alias, and reach a Microsoft 365 group or distribution list in a click.
Works with your AI agent
Connect your own MCP-compatible agent to draft, schedule, and send newsletters and manage your audience, all within the permissions you grant. A person approves every live send and destructive action.
Learn moreHow it works
From sign-in to first send in minutes
- 01
Sign in with Microsoft
Use the Microsoft 365 business account you already have. No new password, and your newsletter sends from the address your readers already know.
- 02
Build your audience
Import your contacts or drop a signup form on your site. Contacts are unlimited on every plan, including Free.
- 03
Write and send
Compose in a clean editor, preview, and send from your own mailbox. The send paces to your mailbox limits, and you watch delivery and clicks as they happen.
Bring your audience
Your audience is already in Microsoft 365. Import it in a click.
Skip the export and re-upload. Pull contacts straight from the Microsoft 365 tools you already keep them in, then send from your own mailbox.
Outlook contacts
Pull your saved Outlook contacts straight into your audience, no CSV export first.
Groups and distribution lists
Send to a Microsoft 365 group or distribution list, kept in sync as a living segment. Growth and up.
Microsoft Bookings customers
Turn the customer list behind your Bookings page into a recurring newsletter audience.
OneDrive files
Pick a contact file, or a newsletter image, straight from OneDrive while you compose.
CSV and Excel
Still have a spreadsheet? Import CSV or Excel and map its columns to your contact fields.
Hosted signup forms
Drop a signup form on your site with double opt-in and bot protection, and contacts flow in.
Importing from Outlook, Bookings, and OneDrive uses delegated Microsoft permissions that are requested only when you use them. Sending to Microsoft 365 groups and distribution lists is available on Growth and up.
Big sends, paced to your mailbox, in plain sight
Microsoft caps how fast any mailbox can send. Instead of hiding that, we show it. The live send view tells you which batch is going out, how many recipients are left, and when a paused send resumes, so a large newsletter is never a black box. How pacing works.
Made for
Built for teams that already run on Microsoft 365
Ready to send from your own mailbox?
Free includes unlimited contacts and 10,000 sends a month. No card required.
Pricing
Pay for sends, not for contacts
Every plan keeps contacts unlimited. Pick a plan by how many emails you send each month. Annual billing saves about 20%.
Free
free forever
10,000 sends / mo
Send from your own mailbox with unlimited contacts and clear delivery reporting.
- Unlimited contacts
- Send from your Microsoft 365 mailbox
- Delivery and bounce reporting
Starter
$84 billed yearly
20,000 sends / mo
Add your own domain, branded links, click analytics, and a public archive.
- Branded links on your domain
- Click analytics and public archive
- No promotional banner
Growth
$180 billed yearly
40,000 sends / mo
Bring three teammates and send from shared mailboxes, aliases, or groups.
- Up to 3 team members
- Shared mailbox or alias sending
- Send to Microsoft 365 groups
Scale
$276 billed yearly
100,000 sends / mo
Send at higher volume with unlimited teammates and every shared-sending feature.
- 100,000 sends every month
- Unlimited team members
- All shared-sending features
Paid plan prices are exclusive of applicable taxes. Polar calculates and adds tax at checkout based on the buyer's location.
Reached your monthly sends? Sending pauses with a prompt to upgrade. No surprise overage charges, ever.
Want the full feature breakdown across plans?
Compare all plansFor your IT team
Sending from your mailbox does not mean handing over the keys
- Microsoft tokens stay server-side, never in your browser
- Every account and record is tenant-isolated
- Disconnect the mailbox any time, in one click
For compliance and records
Your newsletters stay inside your compliance boundary
Every newsletter goes out as ordinary Exchange Online mail from your own mailbox, so your existing Microsoft 365 governance covers it with nothing extra to configure. No tool that sends from its own servers can say the same.
- Retention, litigation hold, Content Search, and eDiscovery apply automatically.
- Your data loss prevention and mail-flow rules evaluate every send, like any other message.
- A copy of every newsletter is filed in a dedicated folder in your sending mailbox.
- Never relayed through a third-party sending service, so it is never handed to an outside sender.
- Every newsletter carries a working unsubscribe link, and opt-outs are honored permanently.
FAQ
Questions, answered
Still unsure? The free plan needs nothing but a Microsoft sign-in.
Do you really not charge per contact?
Correct. Every plan has unlimited contacts. You pay for the emails you send each month, and Free includes 10,000 sends. Grow your list as large as you like without growing your bill.
Where do my newsletters send from?
Your own Microsoft 365 mailbox, using your real work address. Your newsletters are never relayed through a third-party sending service, and there is nothing new to set up.
Do I need a Microsoft 365 business subscription?
Yes. SimpleNewsletter365 is only compatible with Microsoft 365 business subscriptions that include a mailbox. Personal Microsoft accounts are not supported.
Will my email land better here?
Generally, yes. Your newsletter goes out from your own work address, the same way you send everyday email, so inboxes treat it like mail they already trust. Email sent from newsletter platforms' own servers is more likely to be filtered. This applies on every tier, including Free.
Are there sending limits?
Microsoft enforces per-mailbox limits, around 10,000 recipients per day. We pace sends to stay within them and spread large sends over time, and the live send view shows exactly which batch is going out and when a paused send resumes. High-volume senders can connect more than one mailbox.
Can my whole team use it?
Yes. Growth adds up to 3 team members and shared mailbox or alias sending; Scale removes the seat limit. Everyone on the team shares the same access, so a group can run one newsletter together.
How are unsubscribes handled?
Automatically, and you cannot get it wrong. Every newsletter carries a working unsubscribe link, and a send is blocked if that link is missing. Opt-outs take effect immediately, including for a send already in progress, and they survive a contact being re-imported later. Each one is recorded as permanent subscriber history. Readers can unsubscribe from one type of email rather than all of them, and you can host the unsubscribe page on your own domain and write the wording yourself.
Does this fit our compliance and retention policies?
Yes, by design. Newsletters are sent through Microsoft 365 as ordinary email from your own mailbox, and a copy is filed in the sending mailbox. Your organization's existing retention policies, litigation hold, eDiscovery, and data loss prevention rules apply to newsletters the same way they apply to everything else you send. Your newsletters are never relayed through anyone else's sending servers.
Send your first newsletter from your own mailbox
Start free with 10,000 sends a month and unlimited contacts. No card, no new password, no migration.