Monday morning: "Hey uuuh the client receives 3 mails instead of one and only one of them is good, there's a problem, go fix it"

Yesterday, me: - "Hey I've been looking everywhere, made hundreds of tests, there's a problem with the files attached to the mail, they're unreadable"
-" I told you it's in the code, you didn't look deep enough"

This evening: "Umm it seems that there's indeed a permission issue. So I'm gonna rollback everything you've done since Monday"

One year. One year and I live this hell.