The software was obtained by Oracle as part of the company's acquisition of Sun in 2010.
Oracle's Messaging Server could potentially be the most widely deployed commercial email server on the planet, with claims of 150 million mailboxes deployed worldwide (mostly by ISPs, telcos, universities, government, and cable TV broadband providers).
[1] Oracle Communications Messaging Server has a long history, drawing technology from In addition to the Messaging Server's three parents, the software has undergone multiple brand naming changes: The code base has been carried on throughout these minor brand changes with only feature enhancements and bug fixes.
The supporting software is included in the Communications Suite bundle with limited-use license rights.
[3] The Messaging Server is supported to run on multiple operating systems including Solaris and Red Hat Enterprise Linux.