Перевод - Португальский-Итальянский - Olá querido! Como está? Espero que esteja tudo...

Spero che tutto va bene

Già so che sei stato malato

3rd line is incorrect, I agree with Lilian, and also the 5th line needs to be edited. "Mi auguro" I guess it's more formal and this isn't the case because it's a conversation between friends, lovers...

Yes, my version is probably more formal, I used the subjunctive version (che vada) that is the right version in "good" italian, but today many people doesn't use subjunctive anymore (unfortunately!)