Apps similar to Maily include addy.io, which is open source with a free version. Other options are MailDrop, Firefox Relay, Guerrilla Mail and TemporaryMail. There's no shortage of Disposable Email Services like Maily, with more than 100 alternatives for the web, Mac, Windows, Linux and Android.
Imitate Email is a fake SMTP server for developers and testers. It includes an embeddable widget so that testers can quickly see sent emails alongside the app they're testing.
United Kingdom
Sendpit is a hosted email testing sandbox designed for developers and QA teams. It allows applications to send emails to a safe inbox where messages can be inspected, debugged, and tested without being delivered to real users.
India
A lightweight SMTP server written in Go, made for receiving large volumes of mail. To be used as a package in your Go project, or as a stand-alone daemon by running the "guerrillad" binary.
Mailfox is an easy-to-use tool that uses webhooks from Mailgun, Sendgrid, Postmark, Resend, Mailersend and Brevo to track bounced and missed emails.
If emails bounce or are not delivered, it will notify you immediately and give you instructions on how to fix the problem.
DevMail is an email sandbox service for software developers. It allows developers to capture emails from various environments and inspect HTML, text, source code, raw headers, and attachments, and improve deliverability by analyzing email spam scores.
United Kingdom
Mailnest is an all in one email QA tool for development & testing teams in IT companies to test & improve email functionality.
United Kingdom
Mail On Deck is a free temporary email service designed to give you complete control over your online privacy. When you visit our website. Our temp mail addresses receive emails just like your regular inbox, but they automatically expire after 24 hours.
Disposable email inboxes via API for testing signup and authentication flows, with automatic extraction of one-time passwords and magic links.
Ukraine
NukeMail is a receive-only temporary email service. Pick your own username, choose from 13+ rotating domains, and get an access code to return to your inbox from any device. No account, no password, no personal data collected.
Australia
A fake SMTP server for e-mail integration testing. We capture all the e-mails we receive and make them available via our website and REST API.
United States