Why Outlook mailboxes need warming
Microsoft 365 inboxes start with little or no sending history. Like Google, Microsoft tracks engagement, complaint rates, and sudden volume spikes — and a fresh mailbox blasting email on day one is a fast path to the junk folder.
Warming gives Microsoft's filters time to see legitimate activity: opens, replies, and steady sending patterns instead of an overnight blast from a brand-new account.
SuperWarm automates that process so you are not manually coordinating warmup threads across dozens of inboxes.
What you get
Microsoft OAuth
Connect Outlook and Microsoft 365 mailboxes securely — no legacy SMTP credentials to rotate or leak.
Hands-off warming
Daily warming runs automatically. No spreadsheets tracking which inbox replied to whom.
Reputation-first ramp
Volume increases gradually so Microsoft sees consistent behavior, not a red-flag spike on day three.
Warm here, send anywhere
SuperWarm does not replace how you send email — it prepares the mailbox so your real email lands better.
How Outlook warming works
- 1
Authorize with Microsoft
Sign in via Microsoft OAuth. SuperWarm gets the permissions needed to send and receive warming emails.
- 2
Automatic network exchanges
Conversational warming emails flow through our network, generating the engagement signals Microsoft rewards.
- 3
Send for real when ready
After 2–4 weeks of warming, use the inbox normally and increase volume with a healthier baseline.
Gmail + Outlook on one plan
A lot of people use both Google and Microsoft mailboxes. SuperWarm lets you warm Google Workspace and Microsoft 365 inboxes on the same account with one flat Pro price.
Also warming Gmail?
See our Gmail warming guide for Google-specific setup and timeline expectations.
Pricing
Free for up to 10 mailboxes. Pro is $49/month for unlimited mailboxes across Gmail and Outlook. No per-inbox fees as you add more.
Every plan includes
- Google & Microsoft OAuth connect
- Automatic daily warming
- Reputation dashboard
- Self-serve setup — no sales call required
Outlook warming FAQ
- Does SuperWarm support Microsoft 365 and Outlook?
- Yes. Connect Microsoft 365 / Outlook mailboxes via Microsoft OAuth. SuperWarm handles warming the same way as Gmail — automatic daily exchanges in our warming network.
- Can I warm Outlook and Gmail on the same plan?
- Absolutely. Pro is $49/month for unlimited mailboxes across both providers. Free includes up to 10 mailboxes total.
- Is Outlook warming different from Gmail warming?
- Microsoft uses its own reputation signals, but the principle is the same: establish consistent, human-like sending before you increase volume. SuperWarm handles provider-specific warming automatically.
- Do I need a separate warming tool for each email app I use?
- No. SuperWarm warms the mailbox only. Once reputation is ready, use the same Outlook inbox with whatever you send email through.
Good fit if you…
Have a new Outlook inbox
You set up a fresh domain or mailbox and want to warm it before real email goes out.
Live in Microsoft 365
Your email runs on Outlook and you want warming without paying per inbox.
Use Gmail and Outlook
You have mailboxes on both providers. One tool, one bill.
Warm a lot of mailboxes
Flat unlimited pricing beats per-mailbox math when you are warming dozens or more.