mailman-2.1.15-21.el7

Mailman is software to help manage email discussion lists, much like
Majordomo and Smartmail. Unlike most similar products, Mailman gives
each mailing list a webpage, and allows users to subscribe,
unsubscribe, etc. over the Web. Even the list manager can administer
his or her list entirely from the Web. Mailman also integrates most
things people want to do with mailing lists, including archiving, mail
<-> news gateways, and so on.

Documentation can be found in: /usr/share/doc/mailman-2.1.15

When the package has finished installing, you will need to perform some
additional installation steps, these are described in:
/usr/share/doc/mailman-2.1.15/INSTALL.REDHAT

Security issues fixed with this release:

CVE-2015-2775

Fixed bugs:

* Previously, it was impossible to configure Mailman in a way that Domain-based Message Authentication, Reporting & Conformance (DMARC) would recognize Sender alignment for Domain Key Identified Mail (DKIM) signatures. So, Mailman list subscribers that belonged to a mail server with a "reject" policy for DMARC, such as yahoo.com or AOL.com, were unable to receive Mailman forwarded messages from senders residing in any domain that provided DKIM signatures. With this update, fixed it.
* Previously, the /etc/mailman file had incorrectly set permissions, which in some cases caused removing Mailman lists to fail with a "'NoneType' object has no attribute 'close'" message. With this update, fixed it.
* Previously, the mailman utility incorrectly installed the tmpfiles configuration in the /etc/tmpfiles.d/ directory. So, changes made to mailman tmpfiles configuration were overwritten if the mailman packages were reinstalled or updated. The mailman utility now installs the tmpfiles configuration in the /usr/lib/tmpfiles.d/ directory, and changes made to them by the user are preserved on reinstall or update.