Installing DKIM and SPF records
SomeThe plainreason Englishfor here about whydoing this is usefulto get the Action Network software to recognise your domain which will imporove the delivery rates to inboxes (rather than going to jumk/spam).
The extinctionrebellion.uk domain has already been set up. So if you use an email address as your reply-to email, then you don't need to do anything. You can apply for these email addresses here.
It is not possible to do this for gmail/hotmail/aol/outlook etc reply-to email. These should be recognised domains.
But if you have your own domain e.g. xrnottingham.org, then it is worth reading this guide below and whatfollowing issuesthe it fixes...instructions.