A Distribution List is, simply, a list of people that an email is distributed to. You create this list ahead of time, and it is saved in your contact records so that you can quickly send emails to this group of people. DL's work best for lists of people that are relatively static and need frequent. DL in Microsoft commonly refers to a Distribution List, which is a collection of email addresses grouped together to facilitate the sending of messages to multiple recipients simultaneously. Additionally, DL can also denote Download, referring to the process of transferring data from the internet. What does DL mean? The above is one of DL meanings. You can download the image below to print or share it with your friends through Twitter, Facebook, Google or Pinterest. The DL may have other definitions., Microsoft Outlook) or on a server system (e.