# 邮件服务 (Email)

> 邮件发送 API、邮件列表与临时邮箱服务,每月有免费发送额度。
> 共 72 个免费服务。数据来源:https://github.com/ripienaar/free-for-dev(MIT)。更新时间:2026-09-10

- [Unitpost](https://www.unitpost.com/) — AI-First Transactional & Marketing Email Service. Free tier: 5,000 emails/mo, 200 emails/day, 10,000 contacts, 5 domains. No credit card required. SDKs, MCP and REST API available.
- [10minutemail](https://10minutemail.com) — Free, temporary email for testing.
- [AhaSend](https://ahasend.com) — Transactional email service, free for 1000 emails per month, with unlimited domains, team members, webhooks and message routes in the free plan.
- [AnonAddy](https://anonaddy.com) — Open-source anonymous email forwarding, create unlimited email aliases for free
- [anon.li Alias](https://anon.li/alias) — Open source, anonymous email alias/forwarding solution with PGP encryption, reply capability, 10 random & 1 custom alias on the free plan with developer API & CLI.
- [Antideo](https://www.antideo.com) — 10 API requests per hour for email verification, IP, and phone number validation in the free tier. No Credit Cards are required.
- [Anypost](https://anypost.com) — transactional and broadcast email API. 3,000 emails/month free, then as low as 8¢ per 1k
- [Atomic Mail](https://atomicmail.ai) — Email built for AI agents, entirely free. Programmatic inbox creation, custom domains, and full send/receive over the open JMAP standard (RFC 8620/8621); hosted MCP server available. A real mailbox service, not disposable/temporary email.
- [Brevo](https://www.brevo.com/) — 9,000 emails/month, 300 emails/day free
- [Bump](https://bump.email/) — Free 10 Bump email addresses, one custom domain
- [Burnermail](https://burnermail.io/) — Free 5 Burner Email Addresses, 1 Mailbox, 7-day Mailbox History
- [Buttondown](https://buttondown.email/) — Newsletter service. Up to 100 subscribers free
- [Canny Pigeons](https://cannypigeons.com/) — DMARC monitoring platform with DNS drift alerts, IP threat intel and unlimited users. First domain is free - no credit card required.
- [Conduit](https://conduit.email/) — Turn incoming emails into webhooks to trigger your API from emails. The service is completely free.
- [Contact.do](https://contact.do/) — Contact form in a link (bitly for contact forms)
- [debugmail.io](https://debugmail.io/) — Easy to use testing mail server for developers
- [dkimvalidator.com](https://dkimvalidator.com/) — Test if the email's DNS/SPF/DKIM/DMARC settings are correct, free service by roundsphere.com
- [DNSExit](https://dnsexit.com/) — Up to 2 Email addresses under your domain for free with 100MB of storage space. IMAP, POP3, SMTP, SPF/DKIM support.
- [EmailGuard](https://emailguard.lazrek.com/) — Block disposable emails, catch typos, and validate MX records via a simple API. 100 free requests/month.
- [EmailJS](https://www.emailjs.com/) — This is not an entire email server; this is just an email client that you can use to send emails right from the client without exposing your credentials, the free tier has 200 monthly requests, 2 email templates, Requests up to 50Kb, Limited contacts history.
- [EmailLabs.io](https://emaillabs.io/en) — Send up to 9,000 Emails for free every month, up to 300 emails daily.
- [EmailQo Email Infrastructure Grader](https://emailqo.com/email-grader) — Free email infrastructure grader that checks SPF, DKIM, DMARC and mail server configuration. Scores any domain out of 100. No signup required.
- [EmailOctopus](https://emailoctopus.com) — Up to 2,500 subscribers and 10,000 emails per month free
- [Emailvalidation.io](https://emailvalidation.io) — 100 free email verifications per month
- [Emitlo](https://emitlo.com) — free 12,000 emails/month, Email API and SMTP, SPF/DKIM/DMARC support, No Credit Cards are required.
- [EtherealMail](https://ethereal.email) — Ethereal is a fake SMTP service, mainly aimed at Nodemailer and EmailEngine users (but not limited to). It's an entirely free anti-transactional email service where messages never get delivered.
- [forwardemail.net](https://forwardemail.net) — Free email forwarding for custom domains. Create and forward an unlimited amount of email addresses with your domain name (**note**: You must pay if you use .casa, .cf, .click, .email, .fit, .ga, .gdn, .gq, .lat, .loan, .london, .men, .ml, .pl, .rest, .ru, .tk, .top, .work TLDs due to spam)
- [Imitate Email](https://imitate.email) — Sandbox Email Server for testing email functionality across build/qa and ci/cd. Free accounts get 15 emails a day forever.
- [ImprovMX](https://improvmx.com) — Free email forwarding.
- [Inboxes App](https://inboxesapp.com) — Create up to 3 temporary emails a day, then delete them when you're done from within a handy Chrome extension. Perfect for testing signup flows.
- [inboxkitten.com](https://inboxkitten.com/) — Free temporary/disposable email inbox, with up to 3-day email auto-deletes. Open source and can be self-hosted.
- [Is It Disposable](https://isitdisposable.com/) — Detect and block disposable email addresses. Free plan of 250 lookups a month and no card required.
- [KaiMail](https://kaimail.net) — Email forwarding for custom domains with ARC/DKIM signing. Free plan includes 1 domain, 1 mailbox, 300 emails/month, and up to 1MB message size. Email receiving webhook also available. Special plans for open-source projects.
- [mail-tester.com](https://www.mail-tester.com) — Test if the email's DNS/SPF/DKIM/DMARC settings are correct, 20 free/month.
- [Maileroo](https://maileroo.com) — SMTP relay and email API for developers. 5,000 emails per month, unlimited domains, free email verification, blacklist monitoring, mail tester and more.
- [mailcatcher.me](https://mailcatcher.me/) — Catches mail and serves it through a web interface.
- [mailchannels.com](https://www.mailchannels.com) — Email API with REST API and SMTP integrations, free for upto 3,000 emails/month.
- [Mailcheck.ai](https://www.mailcheck.ai/) — Prevent users to sign up with temporary email addresses, 120 requests/hour (~86,400 per month)
- [Maildroppa](https://maildroppa.com) — Up to 100 subscribers and unlimited emails as well as automations for free.
- [MailerLite.com](https://www.mailerlite.com) — 1,000 subscribers/month, 12,000 emails/month free
- [MailerSend.com](https://www.mailersend.com) — Email API, SMTP, 500 emails/month free for transactional emails, 100 API requests/day
- [mailinator.com](https://www.mailinator.com/) — Free, public email system where you can use any inbox you want
- [Mailjet](https://www.mailjet.com/) — 6,000 emails/month free (200 emails daily sending limit)
- [mailsac.com](https://mailsac.com) — Free API for temporary email testing, free public email hosting, outbound capture, email-to-slack/websocket/webhook (1,500 monthly API limit)
- [Mailtrap.io](https://mailtrap.io/) — Email API and SMTP with 4,000 emails/month free, limited to 150 emails/day. Email Marketing includes 500 contacts and 1,500 emails/month. Email Sandbox includes 50 test emails/month, one sandbox, and up to 10 stored emails.
- [Mutant Mail](https://www.mutantmail.com/) — Free 10 Email IDs, 1 Domain, 1 Mailbox. Single Mailbox for All Email IDs.
- [OneSignal](https://onesignal.com/) — 10,000 emails/month,No Credit Cards are required.
- [Orbisearch](https://orbisearch.com) — Free bulk email validator, 100 validations per day, no signup required.
- [Parsio.io](https://parsio.io) — Free email parser (Forward email, extract the data, send it to your server)
- [Plunk](https://useplunk.com) — 3K emails/month for free
- [Postmark](https://postmarkapp.com/) — 100 emails/month free, unlimited DMARC weekly digests.
- [Proton Mail](https://proton.me/mail) — Free secure email account service provider with built-in end-to-end encryption. Free 1GB storage.
- [Reloop](https://reloop.sh) — Transactional email API and SMTP for developers. Free plan: 3,000 emails/month, 200 emails/day, one custom domain and one agent inbox.
- [Resend](https://resend.com) — Transactional emails API for developers. 3,000 emails/month, 100 emails/day free, one custom domain. [SendBridge Mail Tester](https://sendbridge.com/mail-tester) — Free email deliverability test with no signup. Generates a unique inbox address, then analyzes SPF, DKIM, DMARC, Rspamd spam score, 23+ RBL blacklists, reverse DNS, and content quality. Unlimited tests, results in seconds, shareable report pages.
- [Sender](https://www.sender.net) — Up to 15,000 emails/month, up to 2,500 subscribers
- [Sendpulse](https://sendpulse.com) — 500 subscribers/month, 15,000 emails/month free
- [SendStreak](https://www.sendstreak.com/) — Email framework as a service, that adds templates, automations, history, etc to your own SMTP server (E.g. AWS, Maileroo, Gmail). Free up to 100 emails/day, no time limit.
- [SimpleLogin](https://simplelogin.io/) — Open source, self-hostable email alias/forwarding solution. Free 10 Aliases, unlimited bandwidth, unlimited reply/send. Free for educational staff (student, researcher, etc.).
- [SMTPfast](https://smtpfa.st/) — SMTPfast is a simple email API for developers with a free tier that includes 3,000 emails/month, 1 domain, and 1,000 contacts, with no credit card required.
- [Substack](https://substack.com) — Unlimited free newsletter service. Start paying when you charge for it.
- [Suped](https://www.suped.com/) — A user-friendly DMARC monitoring platform. The free plan covers one domain with up to 1,000 emails per month.
- [Sweego](https://www.sweego.io/) — European transactional emails API for developers. 100 emails/day free.
- [temp-mail.io](https://temp-mail.io) — Free disposable temporary email service with multiple emails at once and forwarding
- [Temp-Mail.org](https://temp-mail.org/en/) — Temporary / Disposable Mail Gen Utilizing a range variety of domain. Email Address refreshes every time the page is reloaded. It is entirely free and does not include any pricing for their services.
- [TempMailDetector.com](https://tempmaildetector.com/) — Verify up to 200 emails a month for free and see if an email is temporary or not.
- [trashmail.com](https://www.trashmail.com) — Free disposable email addresses with forwarding and automatic address expiration
- [Tuta](https://tuta.com/) — Free secure email account service provider with built-in end-to-end encryption, no ads, no tracking. Free 1GB storage, one calendar (Tuta also have an [paid plan](https://tuta.com/pricing).). Tuta is also partially [open source](https://github.com/tutao/tutanota), so you can self-host.
- [Verifalia](https://verifalia.com/email-verification-api) — Real-time email verification API with mailbox confirmation and disposable email address detector; 25 free email verifications/day.
- [verimail.io](https://verimail.io/) — Bulk and API email verification service. 100 free verifications/month
- [Waitlio](https://waitlio.com/) — Waitlist management software for product launches. Create branded waitlist pages, collect and verify email subscribers, manage signups with tags and analytics. Free plan includes 100 subscribers/month, 1 waitlist, and API access.
- [Wraps](https://wraps.dev) — email automation workflows, 5k tracked events and unlimited contacts free.
- [ZeroSMTP](https://github.com/msgwing/ZeroSMTP) — Free SMTP relay on the msgwing.com domain, up to 200 emails/day, no paid tier. Sends from a shared @msgwing.com address only (no custom domain). Ready-to-run code examples in 15 languages plus Windows Server/Linux/network printer setup guides.