Freedom251 › Email Outreach Software
Mailwarm
What Mailwarm is
Mailwarm is a web-based email warmup and deliverability service intended to improve sender reputation and inbox placement. It automates scheduled, progressive warmup across Gmail, Outlook, Microsoft 365, Yahoo, and SMTP. Warmup activity can include opening and replying to messages, moving them out of spam, and marking them important. Mailwarm says its engagement network includes more than 50,000 real email accounts across Gmail, Outlook, Yahoo, and Microsoft 365. Alongside warmup, it monitors spam scores and inbox placement, offering provider-level insights and early issue detection. Its checks include SPF, DKIM, and DMARC validation, blacklist detection, and SMTP and IMAP configuration checks. Connections include one-click Gmail and Outlook or Office 365 options, as well as custom SMTP servers. Mailwarm says OAuth connections do not require password sharing and its pricing page says IMAP access is not required. The service can detect invalid email addresses and deactivate their inboxes to reduce bounce risk. Plans are paid, starting at $69 a month billed annually for Starter; there is no traditional free trial or free plan. Mailwarm also offers a free email spam checker. It says its infrastructure is hosted in Ireland and connections are authenticated and SSL-encrypted.
Who it suits
Mailwarm suits sales and outbound teams, founders launching domains, agencies managing inboxes, and businesses working to recover from spam placement. Its plans vary by mailbox, user, and daily warmup allowances, with expert calls included at plan-specific levels.
What it does well
- Automates progressive warmup with scheduling across major email providers and SMTP.
- Engagement network includes 50,000+ real email accounts.
- Monitors inbox placement and spam scores with provider-level insights.
- Checks SPF, DKIM, DMARC, blacklists, SMTP, and IMAP configuration.
- OAuth connections do not require password sharing.
- Every plan includes deliverability expertise.
What to know first
- No free plan or traditional free trial.
- Starter is limited to one mailbox or SMTP connection and 50 warmup emails daily.
- Paid plans start at $69 a month billed annually.
Limits
Starter costs $69 a month billed annually and allows one mailbox or SMTP connection, one user, up to 50 warmup emails per day, and up to 50 replies. Mailwarm has no free plan or traditional free trial; its free offering is an email spam checker.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Growth | Billed annually · Up to 200 warmup emails/day · Up to 200 replies/day · 800+ positive interactions · 3 mailboxes/SMTPs · 2 users · 4 expert calls/month | $159 a month |
| Scale | Billed annually · Up to 500 warmup emails/day · Up to 500 replies/day · 2000+ positive interactions · 10 mailboxes/SMTPs · 5 users · On-demand expert calls | $479 a month |
| Starter | Billed annually · Up to 50 warmup emails/day · Up to 50 replies/day · 200+ positive interactions · 1 mailbox/SMTP · 1 user · 1 expert call/month | $69 a month |
| Tailored Plan | Everything in Scale · Unlimited mailboxes, users, warmup emails and replies · Dedicated deliverability expert | On request |
As mailwarm.com lists them, read 15 Oct 2026. The maker's own page has the final word.
Getting started
- Visit Mailwarm's website.
- Choose a paid plan based on mailbox, user, and daily warmup limits.
- Connect Gmail, Outlook or Office 365, or a custom SMTP server.
- Set up warmup scheduling and progressive volume ramp-up.
- Use the monitoring and infrastructure checks for deliverability oversight.
Verdict
Choose Mailwarm if you need automated warmup alongside inbox-placement monitoring and infrastructure checks, and its annual paid plans fit your mailbox needs. Look elsewhere if you require a free warmup plan or a traditional free trial.
Questions
Does Mailwarm have a free plan or trial?
It has no free plan and does not offer a traditional free trial. The site offers a free email spam checker.
What does Starter cost?
Starter costs $69 a month, billed annually.
What platforms and email services does it support?
Mailwarm is web-based. Warmup supports Gmail, Outlook, Microsoft 365, Yahoo, and SMTP; connections include Gmail, Outlook or Office 365, and custom SMTP.
What are Starter's limits?
Starter includes one mailbox or SMTP connection, one user, up to 50 warmup emails per day, up to 50 replies, 200+ positive interactions, and one deliverability expert call per month.
Can I cancel a subscription?
Mailwarm says subscriptions can be canceled at any time.
How does Mailwarm handle account connections and security?
Mailwarm says OAuth connections do not require password sharing and its pricing page says IMAP access is not required. It says connections are authenticated and SSL-encrypted and its infrastructure is hosted in Ireland.
Facts from Mailwarm's own pages
- Account connection
- Mailwarm says its OAuth connections do not require password sharing; it also says no IMAP access is required on its pricing page. · mailwarm.com, 8 Oct 2026
- Authentication checks
- Mailwarm checks SPF, DKIM, DMARC, SMTP and IMAP configuration and detects blacklist listings. · mailwarm.com, 15 Oct 2026
- Automated warmup
- The service automates warmup across Gmail, Outlook, Microsoft 365, Yahoo, and SMTP, with progressive volume ramp-up and scheduling. · mailwarm.com, 8 Oct 2026
- Bounce prevention
- Mailwarm advertises email verification, invalid-address detection and bounce prevention to protect domain reputation. · mailwarm.com, 15 Oct 2026
- Company founding
- Y Combinator lists Mailwarm as founded in 2020 and part of its Summer 2020 batch. · ycombinator.com, 15 Oct 2026
- Company location
- Y Combinator lists the company location as Dubai, United Arab Emirates. · ycombinator.com, 15 Oct 2026
- Company team size
- Y Combinator lists a team size of 10. · ycombinator.com, 15 Oct 2026
- Connection method
- Gmail and Outlook connections use OAuth, while custom SMTP servers are supported; the pricing page says IMAP access is not required. · mailwarm.com, 15 Oct 2026
- Content warmup
- Users can supply their own email templates so warmup resembles their real campaign content and sending patterns. · mailwarm.com, 15 Oct 2026
- Developer and self-hosting availability
- Palisade reports that Mailwarm's published materials describe a commercial service but provide no open-source licence, public repository or self-hosted deployment. · palisade.email, 15 Oct 2026
- Engagement actions
- Warmup interactions can include opens, replies, moving messages from spam, and marking messages as important. · mailwarm.com, 8 Oct 2026
- Engagement network
- The feature page says Mailwarm uses more than 50,000 real inboxes across Gmail, Outlook, Yahoo and Microsoft 365 for opens, replies and conversations. · mailwarm.com, 15 Oct 2026
- Free tools
- The site offers a free email spam checker, while describing the email warmup service as having no traditional free trial. · mailwarm.com, 8 Oct 2026
- Funding and acquisition
- Crunchbase lists Mailwarm as seed-funded, acquired by mailX and headquartered in Paris, France, with a 1–10 employee range. · crunchbase.com, 15 Oct 2026
- Gmail setup
- The Gmail guide instructs users to create a campaign, sign in with Google and grant permission for Mailwarm to send messages. · help.mailwarm.com, 15 Oct 2026
- Help documentation
- The help center includes onboarding, troubleshooting, Gmail or Google Workspace, Mailgun SMTP, generic SMTP and launch-guide articles. · help.mailwarm.com, 15 Oct 2026
- Human-like actions
- Its engagement automation includes replies, archive actions, important marking, variable delays and conversation threads. · mailwarm.com, 15 Oct 2026
- Infrastructure
- The terms identify Amazon Web Services as Mailwarm's technical infrastructure provider. · mailwarm.com, 15 Oct 2026
- Infrastructure checks
- Mailwarm lists SPF, DKIM, and DMARC validation, blacklist detection, and SMTP and IMAP configuration checks. · mailwarm.com, 8 Oct 2026
- Integrations
- Official pages list Gmail, Outlook or Office 365, Yahoo, Zoho, SendGrid, Mailgun and other SMTP services. · mailwarm.com, 15 Oct 2026
- Legal company
- The service agreement identifies the provider as COMUSE SAS, registered at 57 avenue de Bretagne, Rouen, France, registration 849350780. · mailwarm.com, 15 Oct 2026
- Licence
- The terms grant only a limited proprietary use licence and prohibit copying, modification, reverse engineering and mirroring. · mailwarm.com, 15 Oct 2026
- Limit: Capterra integrations and UI
- Older Capterra reviews report that only SMTP or Gmail worked at the time, wanted faster integration delivery and roadmap updates, and found the UI/UX improvable. · capterra.com, 15 Oct 2026
- Limit: G2 reporting and control
- G2 reviewers repeatedly ask for deeper analytics, more mailbox-performance detail, more customization and provider-specific controls; one calls the service expensive and another says warmup can feel slow. · g2.com, 15 Oct 2026
Where Mailwarm stands on Freedom251
- Email Outreach Software#26 of 34
- Email Warmup Software#20 of 24