I really like that this service allows me send my emails with out having them come through in real-time, which saves so much email space! The only thing i dislike about their product are there fees associated when you use more than 20 minutes of your free trial each month - but other then thats great!! Definitely try sending some test Emails using SenderLite before purchasing as they have no way or knowing how well these services will work until after purchase. Great solution if someone has too many mails coming into slack from different sources such as social media platforms ect..