邮件服务

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.

Free, temporary email for testing.

Transactional email service, free for 1000 emails per month, with unlimited domains, team members, webhooks and message routes in the free plan.

Open-source anonymous email forwarding, create unlimited email aliases for free

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.

10 API requests per hour for email verification, IP, and phone number validation in the free tier. No Credit Cards are required.

transactional and broadcast email API. 3,000 emails/month free, then as low as 8¢ per 1k

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.

9,000 emails/month, 300 emails/day free

Free 10 Bump email addresses, one custom domain

Free 5 Burner Email Addresses, 1 Mailbox, 7-day Mailbox History

Newsletter service. Up to 100 subscribers free

DMARC monitoring platform with DNS drift alerts, IP threat intel and unlimited users. First domain is free - no credit card required.

Turn incoming emails into webhooks to trigger your API from emails. The service is completely free.

Contact form in a link (bitly for contact forms)

Easy to use testing mail server for developers

Protect user signups from disposable emails, or just validate an email against disposable service. Free 2000 check credits per month, No Credit Card required.

Test if the email's DNS/SPF/DKIM/DMARC settings are correct, free service by roundsphere.com

Up to 2 Email addresses under your domain for free with 100MB of storage space. IMAP, POP3, SMTP, SPF/DKIM support.

DMARC enforcement service that protects your domain from email spoofing. First domain is free with 90 days of report detail and step-by-step policies you publish yourself.

Tests the technical part, content, link authority and overall score of your email. Also tests where your email will land: inbox, spam or promotions. Inbox tests on Gmail, GMX, Yahoo, AOL and other email providers. Free to use, no card or registration required. Also works via API and MCP.

Block disposable emails, catch typos, and validate MX records via a simple API. 100 free requests/month.

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.

Send up to 9,000 Emails for free every month, up to 300 emails daily.

Free email infrastructure grader that checks SPF, DKIM, DMARC and mail server configuration. Scores any domain out of 100. No signup required.

Up to 2,500 subscribers and 10,000 emails per month free

100 free email verifications per month

free 12,000 emails/month, Email API and SMTP, SPF/DKIM/DMARC support, No Credit Cards are required.

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.

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)

Sandbox Email Server for testing email functionality across build/qa and ci/cd. Free accounts get 15 emails a day forever.

Free email forwarding.

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.

Free temporary/disposable email inbox, with up to 3-day email auto-deletes. Open source and can be self-hosted.

Detect and block disposable email addresses. Free plan of 250 lookups a month and no card required.

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.

Test if the email's DNS/SPF/DKIM/DMARC settings are correct, 20 free/month.

SMTP relay and email API for developers. 5,000 emails per month, unlimited domains, free email verification, blacklist monitoring, mail tester and more.

Catches mail and serves it through a web interface.

Email API with REST API and SMTP integrations, free for upto 3,000 emails/month.

Prevent users to sign up with temporary email addresses, 120 requests/hour (~86,400 per month)

Up to 100 subscribers and unlimited emails as well as automations for free.

1,000 subscribers/month, 12,000 emails/month free

Email API, SMTP, 500 emails/month free for transactional emails, 100 API requests/day

Free, public email system where you can use any inbox you want

6,000 emails/month free (200 emails daily sending limit)

Free API for temporary email testing, free public email hosting, outbound capture, email-to-slack/websocket/webhook (1,500 monthly API limit)

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.

Free 10 Email IDs, 1 Domain, 1 Mailbox. Single Mailbox for All Email IDs.

10,000 emails/month,No Credit Cards are required.

Free bulk email validator, 100 validations per day, no signup required.

Free email parser (Forward email, extract the data, send it to your server)

Transactional email API and SMTP relay service for developers. 3,000 emails a month free.

3K emails/month for free

100 emails/month free, unlimited DMARC weekly digests.

Free secure email account service provider with built-in end-to-end encryption. Free 1GB storage.

Transactional email API and SMTP for developers. Free plan: 3,000 emails/month, 200 emails/day, one custom domain and one agent inbox.

Transactional emails API for developers. 3,000 emails/month, 100 emails/day free, one custom domain.

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.

Up to 15,000 emails/month, up to 2,500 subscribers

500 subscribers/month, 15,000 emails/month free

SendRaven provides an email API for transactional email and agent-driven conversations, including inbound replies and threads. The free tier includes 3,000 outbound emails per month, unlimited contacts and inbound replies, card is required.

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.

Open source, self-hostable email alias/forwarding solution. Free 10 Aliases, unlimited bandwidth, unlimited reply/send. Free for educational staff (student, researcher, etc.).

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.

Unlimited free newsletter service. Start paying when you charge for it.

A user-friendly DMARC monitoring platform. The free plan covers one domain with up to 1,000 emails per month.

European transactional emails API for developers. 100 emails/day free.

Free disposable temporary email service with multiple emails at once and forwarding

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.

Verify up to 200 emails a month for free and see if an email is temporary or not.

Free disposable email addresses with forwarding and automatic address expiration

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.). Tuta is also partially open source, so you can self-host.

Real-time email verification API with mailbox confirmation and disposable email address detector; 25 free email verifications/day.

Bulk and API email verification service. 100 free verifications/month

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.

Email infrastructure deployed to your own AWS account (SES), with a dashboard. Pay AWS directly for sending. Free plan covers 1 AWS account, unlimited domains and contacts.

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.