From the Estonian foreign ministry website:
29 April 2007
Foreign Ministry website once again accessible to all
The Foreign Ministry apologises for any inconveniences caused by the lack of accessibility to the Foreign Ministry website from abroad. The website problems were caused by malevolent attacks from the East (artificially high number of inquiries sent in an organised manner). To protect the site, the Foreign Ministry was forced to block access to the website from abroad. Now the problem is under control and the website is once again accessible to all.