We're building an app that sends email using our clients' servers. The servers have different settings in regards to how many emails can be sent per connection/per second/etc.
Can someone recommend a component for this so we don't have to build our own? I came across MailBee Message Queue (http://www.afterlogic.com/products/message-queue), but I'd love to be able to compare it against something (or hear your experiences with it).