Not too long ago, I wrote a diary discussing SPF and DMARC use on GOV subdomains in different ccTLDs around the world[1]. The results weren’t too optimistic – it turned out that only about 42% of gov.cctld domains had a valid SPF record published and only about 19% of such domains had a valid DMARC record published.
Article Link: https://isc.sans.edu/diary/rss/29452