Mail FlOSS is reliable platform to manage your large database of emails in real time without any hassle or latency issues. It offers you all necessary tools like automation workflow which helps me send mass Emails at once from my computer using batch process rather than sending each message one by one manually! No dislikes as such but would be great if they have some mobile app version available too so that we can access it anywhere anytime easily while working out side office etc. I am managing huge mailing lists consisting thousands of records regularly (at least 10000 - 15000). Also this service has really helped us reduce our manual workload during busy periods when people are away/offline & also help keep track who's been inactive over period of days / weeks etc. So basically its helping increase productivity levels along with reducing wastage due to human nature errors! Its very user friendly tool where anyone new comer could use right MailFloss is very easy to use as it allows me to create lists from my database and add contacts that I am interested in getting emails about. It also has great reports built right into the system so you can see who opened what campaigns and when they did them. The interface could be more user friendly, but after using it for several years now we are still able to navigate around easily enough. Sending out promotional newsletters to large mailing lists via our website.