Mail.be - Mail.be Virtual office
InstAddr - Disposable email address application.
IONOS - IONOS, your digital partner for cloud solutions and web hosting, supporting your needs from websites, domains, servers, and more.
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Scala Hosting email hosting - Scala Hosting email hosting provides the global audience with business email hosting to enable flexible messaging.
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.