In many English dictionaries, I saw the phonetic symbol of short-e is /e/ such as in bed (/bed/). However, I'm taught that the pronunciation of that is /ɛ/. Which one is right in standard English? Does such a difference exist for native speakers?
This question is very different from Could you clarify /e/ and /ɛ/? because I can very clearly understand the difference between /e/ and /ɛ/ in my mother tongue. I am asking which one is correct in standard English, and what's the native speakers' suggestion to English learners on these two sounds.