tinyCampaign is a simple and lightweight newsletter system.
Simple, web-based address & phone book
an 'auto-reply' bot for your mail server
Simple web interface for Postfix domains, accounts, aliases
Free and open source webmail software
Mass lobby by email through subscribers' own email accounts
File sharing via e-mail
Business webmail modular application with mobile client
Webmail made easy!
Edição e envio de e-mails e SMS em massa.
Roundcube simple captcha plugin
E-mail based announcement software.
Webmail open-source in php base on Squiremail
PHP interface to the Vodacom Email2MMS and Email2SMS services