Fast, free to send as many emails you want at all hours (sometimes until early in morning!), great stats for tracking opens & click thrus! No popups when using this solution - it's an excellent program that works perfectly with my client services software!! We've had little issues or slow loading time only once while testing out their trial version which was resolved quickly after reporting back via ticketing system/phone number support available during office hour service times from staff members located throughout US States!! This product is well worth checking through its different plans so choose wisely what features are needed most / least important depending upon need etc... Easy accessability anywhere there might be internet connection whether home computer desktops or laptops business computers workstations even mobile devices like smartphones tablets PC Laptops iPads Mac Books Etc. The best part about sending mail campaigns without any hassle especially if done daily or weekly would have less chance missed opportunity opportunities due too being "late" arriving by minutes sometimes seconds late into inbox!! I used smtpboxes.com for my business email address because it allows me to host my own server and have all my mail going directly into one account. Nothing, this service is great! I would recommend this to anyone looking for an easy way to set up their own email without having to pay a monthly fee. This helped solve our problem of not being able to send emails from multiple domains at once to our clients.