I’m thinking about how to check spam correctly or not, how not to fall for a scammer and not become a spammer yourself when sending out mailings?

Hello. It can be very difficult to understand whether you have received spam by email or whether it is a real mailing, I recommend it honeypot meaning trap . There is a special mail that no one knows about and only spammers can know about it, so everything that comes there is spam. Use this service and remove unwanted emails.