smtp4dev

smtp4dev - the fake SMTP email server for development and testing. A dummy SMTP server for Windows, Linux, Mac OS-X (and maybe elsewhere where .NET Core is available). Lets you test your application without spamming your real customers.

Features

OpenAPI/Swagger API
IMAP access to retrieve and delete messages
TLS/SSL with implicit and STARTTLS modes and auto self-signed cert generation
Multiple mailboxes along with rules to control what message goes where
Reply, compose and relay messages including rules to auto relay
Viewport size switcher to simulate mobile etc
Multipart MIME inspector
HTML compatibility report and HTML validation
Scripting expressions including error simulation

Project Samples

Project Activity

See All Activity >

License

BSD License

Follow smtp4dev

smtp4dev Web Site

Other Useful Business Software

Demo Series - Small Business Backup By Veeam

Learn how to protect your Microsoft 365 data, with simple, actionable tips today.

Watch this on-demand demo series and learn how to protect your Microsoft 365 data with clear, simple, actionable steps that are easy to implement for businesses of all sizes.

Watch Demo Series

Rate This Project

User Reviews

Be the first to post a review of smtp4dev!

Additional Project Details

Operating Systems

Linux, Mac, Windows

Programming Language

Related Categories

C# Email Servers

Registered

2024-06-19

Similar Business Software

hMailServer

hMailServer is a free, open source, e-mail server for Microsoft Windows. It's used by Internet service providers, companies, governments, schools and enthusiasts in all parts of the world. It supports the common e-mail protocols (IMAP, SMTP and POP3) and can easily be integrated with many...

See Software
MDaemon Email Server

The MDaemon Email Server was one of the first Microsoft Exchange alternatives offered to businesses around the world. It has been developed with the ongoing input from IT professionals seeking an easy-to-use, reliable, and secure mail server that does not require expensive administration or...

See Software
Eudora Internet Mail Server

Completely rewritten relay restrictions with an easier to use interface that gives finer control over relay security. New domain name resolver (DNR), EIMS now has it's own DNR, which works around bugs in the Open Transport DNR and performance problems with the OS X DNR. The new DNR does not...

See Software
Kingmailer

KingSMTP.com (formerly known as Kingmailer.co, founded in 2017) is a Transactional SMTP service provider. It’s designed to help businesses reliably send emails such as order confirmations, password resets, or notifications, but it’s not intended for mass email campaigns or marketing.

See Software
Zentyal

Join Windows® clients to the domain and manage them transparently. No disruption to your users, no user or device CALs. Comes with industry-standard SMTP and POP3/IMAP mail server built upon the most established technologies and protocols. Guarantees reliable and secure Internet access and helps...

See Software
OpenSMTPD

OpenSMTPD is a free implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard extensions. It allows ordinary machines to exchange emails with other systems speaking the SMTP protocol. Started out of dissatisfaction with other implementations, OpenSMTPD...

See Software