[4][5] Mailman is coded primarily in Python and currently maintained by Abhilash Raj.

[5] A very early version of Mailman was written by John Viega while a graduate student, who then lost his copy of the source in a hard drive crash sometime around 1998.

[6] Ken Manheimer at Corporation for National Research Initiatives (CNRI), who was looking for a replacement for Majordomo, then took over development.

Mailman 3, the first major new version in over a decade, was released in April 2015.

[8] It works with Unix-style mail servers, such as Exim, Postfix, Sendmail and qmail.