You could have downloaded Tenfourbird 38.7 for Mac from our application library for free. Our built-in antivirus scanned this Mac download and rated it as 100% safe. Tenfourbird for Mac lies within Communication Tools, more precisely E-mail. The actual developer of this free Mac application is Tenfourbird Development Team.
From the developer:
Tenfourbird comes in different tuned versions for specific PowerPC processor families: Tenfourbird G5 Tenfourbird G4 - build 7450 (also for 7440) Tenfourbird G4 - build 7400 (also for 7410) Tenfourbird G3
Tenfourbird is a fast, efficient email always based on the current version of Thunderbird, but unlike the main distribution, Tenfourbird is compatible with OS X 10.4 and 10.5 running on PowerPC processors.
You may want to check out more Mac applications, such as Zimbra Toaster, PageSender or Mail to ToDo X, which might be related to Tenfourbird.