Rumble is a mail server suite for SMTP (ESMTPSA), HTTP, POP3 and IMAP4v1 with an extensive C/C++ and Lua API for scripting. It comes with support for SSL/TLS, SQLite and MySQL and has a web-based administration and webmail feature. Additional included modules feature greylisting, DNS blacklisting, SpamAssassin support and dynamic performance scaling as well as a multithreaded structure that allows for clustering of multiple servers for one or all domains, and with the ease of the Lua API, you can create your own new server mailing lists, CRM software, e-marketing and other extensions within minutes.


  • Flexible SMTP, POP3 and IMAP4v1 server with LEMONADE compliance
  • Easy, seamless integration of C/C++ modules and Lua scripts
  • Intuitive web interface
  • Works on all modern 32 and 64 bit operating systems (Windows, Linux, Mac, other UNIXs)
  • Supports STARTTLS/SSL on all services
  • Supports both SQLite3 and MySQL databases.
  • Optional on-site encrypted storage of mail (coming soon!)
  • Supports SpamAssassin spam filtering (through spamd, of course).
  • Includes greylisting, blacklisting and whitelisting features.
  • Dynamic scaling of performance to match current server load
  • GLOB support for email accounts (fx. *@domain.tld or bugtrack-?????@domain.tld))
  • Support for single/multiple domain administrators in the web interface
  • BATV / VERP support
  • Mutithreaded queue system

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User Reviews

  • Nice job

  • Thank you for your work.

    1 user found this review helpful.
  • O melhor programa para compartilhamento

  • Install seemed to go smoothly but then I couldn't figure out how to actually use it and there is no documentation to help with that.

  • Looks nice but does not work. Could no copy mails from IMAP folder of one server into a rumble mail imap folder running on the local machine. hMailServer does the job better.

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Additional Project Details



Intended Audience

Developers, Testers, System Administrators

User Interface

Console/Terminal, Web-based

Programming Language

C, Lua

Database Environment