Downloading DayPost 1.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The actual developer of this software for Mac is GammaStream Technologies, Inc. The software relates to Business Tools.
From the developer:
DayPost provides users of Marketcircle's DayLite CRM application a method for facilitating the creation of the US postage labels that are available through Endicia for Mac. Using DayLite's plug-in architecture, DayPost adds a menu item for creating these labels from the addresses of a selected Contact or Organization.
You may want to check out more software for Mac, such as Dynadot Account Management Client, which might be similar to DayPost.