Most likely "goodbye" or "see you again" in Russian : dasvidaniya!
thank you that makes sense considering how it was wrote in the email
Russian - or Greek, for that matter - is often difficult to render into latin writing - should you translitterate, i.e. "translate each letter" or describe the sounds phonetically? The word in your question seemed to be "somewhere in between", so I guessed. In Polish, close relative to Russian but written in latin letters, the word is "do widzenia". Best luck with your Russian!