CloudMailin's free plan receives up to 10,000 emails a month at a CloudMailin-issued address and posts each one to your app as an HTTP webhook. Messages are capped at 512KB, custom domains need a paid plan and no card is required; the sign-up page lists outbound email as included too.
Verified ·Oct 15, 2026
Free allowance
What the free plan includes, as the provider states it.
- emails / month
- 10K
- The sign-up page lists inbound and outbound email in the free plan but does not say whether they share this allowance. Outbound volume starts small and CloudMailin raises the daily limit over time.
- message size · Inbound email
- 0.5 MB
- Listed as 512KB per message. Larger messages are rejected during the SMTP conversation, before they reach your endpoint, and the sending server bounces them.
- custom domains · Inbound email
- 0
- Custom domains require a paid plan; free accounts receive mail at a CloudMailin-issued address.
The fine print
Each verdict links to the quote it rests on.
- Free for
- As long as you stay within the limits
- At the limit
- You are asked to upgrade
- Spending cap
- None needed: the free plan cannot bill you
- Idle projects
- No pause rule documented
- Data retention
- No deletion rule documented
- Card at sign-up
- Not requiredCloudMailin's terms forbid using several free accounts to avoid paying for a subscription.
- Identity check
- An email address
- Commercial use
- Not statedNeither the terms nor the acceptable use policy say whether the free plan may be used commercially; the refund policy describes free accounts as a way to test the service and check that it suits your application.
- Mainland China
- Not verified
- Sign-up regions
- No restrictions documented
- Quotas apply per
- Account
Alternatives
Other free plans for the same need, ranked by the same neutral rules.
Changes
- New
Changed: CloudMailin Free added to the catalog
- Oct 15, 2026
- Awaiting review
- Free