I could not find anything meaningful about “podmena traffica test ” but it sounds like some kind of Spam. Best practice is if you don’t recognize the sender, just delete it.
I’d say the best practice is not to ignore it but bring it to your provider or system administrator’s attention. The headers indicate in the ones I’ve gotten that the users SMTP is being exploited in some way as if it came right from your email account, not just the typical injection of your email address in some random email message. The only telltale it didn’t is the actual originating IP address.