How much faster will Mail::Bulkmail be than my current system?
This is a very tough question to answer, since it depends highly upon what your current system is. For the sake of argument, let’s assume that for your current system, you open an SMTP connection to your server, send a message, and close the connection. And then repeat. Open, send, close, etc. Mail::Bulkmail will always be faster than this approach since it opens one SMTP connection and sends every single message across on that one connection. How much faster depends on how busy your server is as well as the size of your list. The connection will only be closed if you have an error or if you reach the max number of messages to send in a given server connection. Lets assume (for simplicity’s sake) that you have a list of 100,000 people. We’ll also assume that you have a pretty busy SMTP server and it takes (on average) 25 seconds for the server to respond to a connection request. We’re making 100,000 connection requests (with your old system). That means 100,000 x 25 seconds = almost 29
