Mailsoftly
Microsoft 365 integration

Email marketing that runs on your Microsoft 365 account.

Sign up with Microsoft, connect your Microsoft 365 account, and send campaigns from the Outlook address your customers already know. No DNS records to start and no separate sender to warm up. Verified Microsoft 365 organizations are approved instantly.
Start free with Microsoft 365 Start free with Google Get a demo
Free to start with your Google Workspace or Microsoft 365 account · No credit card required
Sign in with MicrosoftYour Microsoft 365 account
Connect for sendingMicrosoft sign-in, one click
Campaigns go outFrom your own Outlook address
Connected
Free to start with your Microsoft 365 account. Personal Outlook.com addresses work too, with a lower daily allowance.
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How it works

Sign up with Microsoft, connect, send

Microsoft sign-in creates your account, and connecting your Microsoft 365 mailbox for sending is a standard Microsoft authorization screen. Nothing is typed or pasted, and there are no app passwords to manage.
Sign up with Microsoft 365Create your Mailsoftly account with your work or school Microsoft login. Personal Outlook.com accounts work as well.
Connect your mailbox for sendingAuthorize Mailsoftly with your Microsoft account and your address becomes a sender. Campaigns go out from [email protected] and replies land in Outlook.
Send from day oneVerified Microsoft 365 organizations are approved instantly, so your first campaign can go out the same day. Authenticate your own domain later for full-volume sending.
1
Sign upContinue with Microsoft
2
AuthorizeMicrosoft sign-in, no app password
3
SendCampaigns from your Microsoft 365 address
Microsoft 365 connectedActive
What you get

One login, one sender, zero setup

The Microsoft 365 integration removes the two slowest parts of starting email marketing: proving who you are and setting up a sender. Your audience and campaigns live in Mailsoftly, the sending identity stays yours.
🔒 Sign-in

Microsoft sign-in, instant approval

Sign up and log in with your Microsoft 365 account. Because Microsoft has verified your organization, Mailsoftly approves verified Microsoft 365 businesses instantly instead of putting them in a review queue.

Continue with MicrosoftInstant approvalNo password
📧 Sending

Send from your own address

Connect your Microsoft 365 mailbox and campaigns go out from your Outlook address. Replies land in your Outlook inbox and engagement is tracked in Mailsoftly. Emails are built to render cleanly in Outlook.

Microsoft sign-inYour own addressReplies in Outlook
📈 Growth path

Scale when you are ready

Sending through a connected Microsoft account has a daily allowance that protects your account's reputation. Use gradual sending for bigger lists, or authenticate your own domain on a paid plan for full campaign volume.

Daily allowanceGradual sendingDomain authentication
Microsoft apps that feed your list

Excel, Forms, SharePoint and more, connected through Zapier

Your Microsoft 365 account handles sign-in and sending. The rest of the Microsoft stack reaches Mailsoftly through Zapier, where each pairing is a single trigger and a single action.
Microsoft ExcelA new row in a workbook becomes a Mailsoftly contact, so shared spreadsheets stop being a copy-paste job.
Microsoft FormsForm responses create contacts in the list you choose.
SharePointNew list items can add or tag contacts in Mailsoftly.
Microsoft TeamsA message in a channel can trigger a Zap that adds a contact or a tag.
OutlookFlagged or categorized emails can create contacts, which turns your inbox into a lead source.
Dynamics 365New CRM contacts can be mirrored into a Mailsoftly list for campaigns.
Sending a large mailing from Outlook itself? Read how to send mass email in Outlook, and see all pairings on the Zapier integration page.
Set it once

From Microsoft sign-in to first campaign, the same day

Sign up, connect, import your contacts and send. A welcome automation can be running before lunch, sending from the address your customers already know.
Sign in with MicrosoftAccount created
Connect sendingMicrosoft sign-in, one click
Import contactsCSV, Excel or Zapier
First campaignFrom your Microsoft 365 address

Made for teams that live in Microsoft 365.

Sign in with Microsoft, send from Microsoft, and keep everything else connected: Excel and Forms through Zapier, any app through the documented REST API and webhooks, and AI tools through the Mailsoftly MCP server. Google shop instead? The Google Workspace integration works the same way.
Instant
approval for verified Microsoft 365 organizations
Verified
publisher on Microsoft Marketplace
Free
to start, no credit card
Microsoft 365sign-in and sending
ZapierExcel, Forms, SharePoint, Outlook
REST API and webhooksany app, both directions
MCP serverfor AI tools
FAQ

The Microsoft 365 integration, answered

Does Mailsoftly integrate with Microsoft 365?

Yes. You can sign up and log in to Mailsoftly with your Microsoft 365 account, and connect that account so your campaigns are sent from your own Outlook address. The connection uses Microsoft's secure sign-in, so no app passwords are involved.

Can I send campaigns from my Outlook address?

Yes. Connect your Microsoft 365 or Outlook.com account and choose it as the sender. Replies land in your Outlook inbox and opens and clicks are tracked in Mailsoftly. Microsoft 365 work accounts get a higher daily allowance than personal Outlook.com addresses.

Is there a sending limit through a connected Microsoft account?

Yes, on purpose. Microsoft accounts have their own sending limits, so Mailsoftly caps campaigns sent through a connected account per day to protect your account from being flagged or blocked. For larger lists, use gradual sending to deliver over several days, or authenticate your own domain on a paid plan to unlock full campaign volume.

Why are Microsoft 365 organizations approved instantly?

Every new Mailsoftly account is checked before it can send, to protect deliverability for everyone. A Microsoft 365 work sign-in proves the organization behind the account, so verified Microsoft 365 businesses skip the review queue and can send right away.

Is Mailsoftly on the Microsoft Marketplace?

Yes. Mailsoftly is a verified publisher on Microsoft Marketplace, which matters for organizations that buy through approved channels, such as schools, local government and nonprofits. You can also sign up directly with your Microsoft account.

Is the Microsoft 365 integration free?

Yes. Mailsoftly's free plan starts with your Microsoft account and no credit card, and it includes connecting your Microsoft account for sending. Paid plans add higher volumes and domain authentication.

What else does Mailsoftly connect to?

Google Workspace, WordPress, Shopify, Jotform, HubSpot and Zapier connect natively, plus a documented REST API and webhooks and an MCP server for AI tools. See the full picture on the Mailsoftly integrations page.

Start with the Microsoft account you already have

Sign up with Microsoft 365, connect your mailbox, and send your first campaign today from the address your customers know.

Start free with Google Start free with Microsoft 365
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