My e-mail address is {removed email address}
The error message is in swedish:
"Du har nått gränsen för antalet tillåtna skickade meddelanden under ett dygn. Spara meddelandet och skicka det senare."
and translates into something like:
"You have reached the limit for the number of messages allowed in 24 hours. Save your message and send it later."
I looked into the article you are referring to earlier, but since this isn't a new account there should be a 300 message limit? However his account is rarely used, and solely for a special occasion that takes place every December. This year I'm hosting it and I took over the account a few weeks ago, and probably no one has logged in since last December.