I use
<p>Messaggio
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for bibione-appartamenti.com
I use the same for the others even ones that work (sorry my English is the worst).
It's strange and funny. Until yesterday I have no problem, then I riceveid a form from my utent with two letters (ch) but at the beginning I suppose that he was Swiss......It's crazy, I know . Then I think to check the CF7 and I find this singular situation.
But the upgrade to version 3.4 I've made a week o more ago