Outlook.com and Hotmail email warmup setup
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Personal Microsoft mailbox setup requires the planned OAuth connection.
MailSlurp uses credentials owned by your account to send warmup messages. The connection is isolated from MailSlurp's own delivery accounts and can also be reused by automated inbox placement.
Direct Outlook.com and Hotmail setup is not available yet. Do not enter unrelated account credentials. Choose another supported sender or use the generic SMTP option only when your provider supplies remote SMTP credentials.
Before you connect
- Use Microsoft 365 only for a business tenant with authenticated SMTP enabled.
- Confirm that the From address is authorized by the provider.
- Create a dedicated, least-privilege credential for MailSlurp when the provider allows it.
Connect in MailSlurp
Return to the email warmup provider table and choose an available connection.
Connection values
| Connection type | Not available |
|---|---|
| Credential | OAuth authorization when released |
- Direct Outlook.com warmup connections are not available yet.
Troubleshooting
- Confirm the credential has sending permission and has not expired or been revoked.
- Confirm the From address or domain is verified with the provider.
- For SMTP, confirm the host, port, security mode, and username match the provider settings.
- Check whether an account security policy blocks SMTP or requires an app password.
- Retry the connection test after correcting the provider setting or rotating the credential.
After connection, see email warmup configuration and resultsfor ramp, schedule, content, placement, pause, and resume guidance.