Staffan Hörnberg started off by thanking pupils, staff and alumni for their support.
"Lundsbergare, stand tall, you have my admiration," he wrote.
He then went on to defend his staff members' response to the weekend reports that two new pupils were burned with electric irons in the latest case of hazing to hit the eliet fee paying school.
"We have been subjected to persecution that is unparalleled. The school has taken the criticisms that have been raised very seriously, and I think we've made a heroic effort to put right all the deficiencies that have been criticised," he writes.
He is also upset over reports that he tacitly accepted a form of hazing called "the submarine" and claims this is slander. "All forms of hazing are banned at Lundsberg," he wrote.
Hörnberg also criticised the Swedish Schools Inspectorate, which yesterday closed Lundsberg until further notice.
"I would doubt the value system behind the schools inspectorate's action," he wrote.