Most of my friends don’t check spam/junk folder of their email accounts. Most people think that it contains emails from spammers. Is it right? I think it’s not 100% right. Sometimes people missed very important email from any friend.
Sometimes it happens with new email address. Some email account providers take new account holder as suspected and put his email in spam. Sometimes email account holders block email of his competitor email provider.
I often noticed that some emails in my spam folder are not from spammers but it was my friend’s email. So must check spam folder, you don’t need to check every mail but check sender name.