1. Authorize at Microsoft
Choose the Microsoft 365 work or school account that will send the messages. The sign-in and consent screens are hosted by Microsoft; your Microsoft password is never entered into smtpify365.
- Delegated Mail.Send permission for sending
- User.Read and basic identity scopes to identify the connected mailbox
- offline_access so the connection can refresh access without another interactive sign-in
2. Save the dedicated credentials
smtpify365 creates a random SMTP username and a 256-bit password. The password is displayed once. Store it in the device or application immediately because it cannot be recovered later.
3. Configure the SMTP client
The device still uses the familiar settings it supports. Authentication is accepted only after STARTTLS.
- Server: the hostname displayed by smtpify365
- Port: 587
- Connection security: STARTTLS
- Authentication: required, using the generated SMTP username and one-time password
- Envelope sender: the Microsoft 365 mailbox that authorized the connection
4. Send through Microsoft 365
smtpify365 accepts the MIME message and submits it to the connected mailbox through Microsoft Graph. A successful SMTP submission means Graph accepted the message; final recipient delivery remains subject to Exchange Online processing and limits.
Stay in control
Each connection is separate. Revoke a single connection from the dashboard without changing the Microsoft account password or interrupting other SMTP clients.