Just a heads up for those wanting to install Mailman3 on a Centos 7 server, be aware of FirewallD. There are a number of ports and services you have to tell it to allow in order to get Mailman3 functional. More experienced sysadmins might know this but I did not.
hi so can you share which ports and services I should enable? my mailman3 is not working. Thanks in advance