The aim of this paper is to identify postediting guidelines that need to be highlighted in the context of translation training. The analysis of a corpus of texts post-edited by 10 translation trainees reveals how they intuitively approach postediting. The corpus shows that stylistic and phraseological changes are kept to a minimum, and that most errors occur in the field of calque or translation loss. On the basis of the intuitive post-editing strategies observed, a number of recommendations are made for teaching purposes, and they include the need for error analysis of MT output.