Reference for email hosting, transactional APIs, newsletter platforms, and disposable email tools.

## Email hosting

- **[iCloud+](https://www.apple.com/icloud/)** — email hosting with custom domain support for Apple users
- **[Fastmail](https://www.fastmail.com/)** — independent email hosting focused on privacy and performance
- **[Namecheap](https://www.namecheap.com/hosting/email/)** — affordable email hosting bundled with domain registration
- **[Hostinger](https://www.hostinger.com/email-hosting)** — basic email hosting for small sites
- **[Mailbox.org](https://mailbox.org/en/services#e-mail-account)** — privacy-focused email hosting based in Germany
- **[Tuta](https://tuta.com)** — end-to-end encrypted email with calendar and contacts
- **[Proton Mail](https://proton.me/mail)** — end-to-end encrypted email based in Switzerland
- **[ImprovMX](https://improvmx.com/)** — free email alias forwarding for custom domains

## Email API

- **[Mailgun](https://www.mailgun.com/)** — transactional email API with SMTP relay and log analytics
- **[Postmark](https://postmarkapp.com/)** — transactional email delivery focused on inbox placement
- **[AWS SES](https://aws.amazon.com/ses/)** — Amazon Simple Email Service for high-volume sending
- **[SendGrid](https://sendgrid.com/)** — email API for transactional and marketing email
- **[Mandrill](https://mailchimp.com/features/transactional-email/)** — transactional email add-on for Mailchimp
- **[Resend](https://resend.com/)** — email API for developers with React Email integration

## Newsletter services

- **[listmonk](https://listmonk.app/)** — self-hosted, [open-source (AGPLv3)](https://github.com/knadh/listmonk) newsletter, mailing list manager, and transactional sender; single Go binary or Docker container, multi-threaded multi-SMTP queue, SQL-based subscriber segmentation, Go-template campaigns with visual + code editors, OIDC SSO, REST API, extensible messengers for email/SMS/WhatsApp; runs comfortably on tiny resources (millions of emails on a fraction of a core)
- **[Sendy](https://sendy.co/)** — self-hosted newsletter tool that sends via [AWS SES](https://aws.amazon.com/ses/)
- **[Substack](https://substack.com/)** — newsletter and subscription publishing platform

## Testing

- **[Mail Tester](https://www.mail-tester.com/)** — online spam score checker; send an email to the provided address and get a deliverability report

### Local SMTP servers

Local SMTP servers capture outgoing email during development — no risk of sending to real recipients.

- **[Mailpit](https://mailpit.axllent.org/)** — modern successor to MailHog; SMTP server with web UI, REST API for integration tests, and HTML preview support
- **[MailHog](https://github.com/mailhog/MailHog)** — simple Go-based SMTP test server distributed as a single binary; web UI and JSON API; no longer actively developed, Mailpit recommended

## Temporary email

- **[Email.ml](https://email.ml/)** — minimalist temporary email
- **[Temp Mail](https://temp-mail.org/en/)** — disposable email with a simple web interface
- **[10 Minute Mail](https://10minutemail.com/)** — auto-expiring temporary email address

## Disposable domain lists

- **[disposable-email-domains](https://github.com/disposable-email-domains/disposable-email-domains/)** — community-maintained list of disposable email domains
- **[disposable/disposable](https://github.com/disposable/disposable)** — aggregated blocklist of throwaway email providers