Best Free Email Tools

Transactional email API — 100 emails/month free, never expires, no credit card required

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 API with REST API and SMTP integrations. Free: 100 emails/day (~3,000/month), 3 domains, community support.

250 subscribers, 2,500 emails/month free, 2 user seats, community support

300 emails/day, unlimited contacts (fair use policy), marketing automation, segmentation, landing pages. Formerly Sendinblue Best for unlimited usage needs.

SMTP relay and email API for developers. 3,000 emails per month, unlimited domains, webhooks free Best for unlimited usage needs.

Email marketing — 250 contacts, 500 sends/month (250/day cap), 1 audience, 1 seat, marketing CRM, forms and landing pages, email support first 30 days

Free, temporary email for testing.

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

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.

Newsletter service. Up to 100 subscribers free

Superseded: As of 2026-08-28, mail.aionda.com reads: Free tier includes up to 25 disposable addresses, encrypted mailbox, calendar & contacts. Plus tier is €1.99/month for up to 10,000 disposable addresses, unlimited forwarding, custom domains, calendar invitations, and 1 GB encrypted drive. Enterprise tier starts at €1.49/employee/month. We are not publishing our stored Aionda Mail terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓ Note — discovered 2026-08-28: The free tier now has limits of up to 25 disposable addresses, and includes an encrypted mailbox and calendar & contacts. There are also paid tiers available now. Source ↗

Free 10 email aliases, one custom domain. Rebranded from Bump to Alias.email.

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.

Prevent users from signing up with temporary email addresses, 120 requests/hour. Rebranded to UserCheck.

Superseded: As of 2026-09-10, inboxkitten.com reads: Inboxkitten is a free, open-source disposable email service. Self-hosting is available for $0/month, but requires Firebase and Mailgun accounts (which have their own free tiers). Emails auto-delete after several hours (officially 3 days according to mailgun). We are not publishing our stored inboxkitten.com terms beside it — our own pricing change record, discovered 2026-09-10, names them as the previous ones. Read what we recorded ↓ Note — discovered 2026-09-10: A free tier still exists, the details have changed. Have their own free tiers but incur costs if limits are exceeded. The auto-delete time is stated as 'several hours' but also 'officially 3 days according to mailgun'. The emphasis on self-hosting and external service costs introduces a new element. Source ↗

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

email automation workflows, 5k tracked events and unlimited contacts free. Best for unlimited usage needs.

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

Open-source email platform with 1,000 transactional/marketing emails/month free

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.

Email API, SMTP, 500 emails/month free for transactional emails

Free MIT-licensed self-hosted mail server for websites and web servers — an open-source stand-in for Sendgrid, Mailgun or Postmark that you run yourself. No hosted or paid plan is offered; the only cost is the infrastructure you send from.

Catches mail and serves it through a web interface.

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

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

1,000 contacts, 4,000 emails per 30 days (marketing + transactional). All features included. Transactional-only recipients don't count toward contact limit

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

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

Superseded: As of 2026-08-28, addy.io reads: Free $ 0 /month Sign Up Unlimited Standard Aliases 10 Active Shared Domain Aliases 1 Recipient (real email address) 2 Available Alias Domains 10MB Monthly Bandwidth Limit. We are not publishing our stored addy.io terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓ Note — discovered 2026-08-28: The free tier still exists, but the description of the limits has changed. The free tier now includes 10MB monthly bandwidth, and 1 recipient. Source ↗

Three separate free products. Email API/SMTP: 4,000 emails/month (150/day cap), 1 domain, 3-day log retention. Email Sandbox (testing): 50 test emails/month, 1 sandbox. Email Marketing: 1,500 emails/month, 500 contacts. 1 user each.

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

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

Up to 100 subscribers and 2,500 emails/month free

Email API — 6,000 emails/month (200/day limit), 1,000 contacts, email editor and templates

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

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. Best for open source projects.

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.

Open source, self-hostable email alias/forwarding solution. Free 10 aliases, unlimited bandwidth, free replies from aliases. New outbound messages from aliases require Premium. Free for educational staff (student, researcher, etc.). Best for open source projects and students and unlimited usage needs.

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

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

100 free email verifications total (one-time, not monthly)

Easy to use testing mail server for developers

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

Email forwarding for 1 domain, 25 aliases, up to 500 forwards/day free

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

Superseded: As of 2026-08-28, forwardemail.net reads: Free Only supports email forwarding $0 /month for unlimited domains Forward your domain's mail Unlimited inbound email Spam protection 50 MB attachment limit. We are not publishing our stored forwardemail.net terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓ Note — discovered 2026-08-28: The free tier now has a 50MB attachment limit and only supports email forwarding. Sending mail is now a paid feature. Source ↗

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

Transactional email service, free for 1,000 emails per month, 3 sending domains, 7-day data retention, basic support. Includes REST API, SMTP relay, sandbox mode, SDKs, scheduling, open/link tracking, webhooks.

Email marketing with 2,000 contacts, 6,000 emails/month, and 3 campaigns/month free

Developer-first email API — 3K emails/month free (100/day cap), 3 domains, 1K marketing contacts/month, 5 AI credits, 30-day data retention

Superseded: As of 2026-08-28, dnsexit.com reads: DNSExit offers free Dynamic DNS, Remote Access, and SSL certificates. Business Email and Outgoing Mail Relay 'Starts with Free plans'. We are not publishing our stored DNSExit terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓ Note — discovered 2026-08-28: The free tier now offers 'Free Dynamic DNS, Free Remote Access, Free SSL Certificates' and 'Starts with Free plans' for Business Email and Outgoing Mail Relay. Source ↗