“Do you know that number of spam emails greatly exceeds the number of legitimate emails? According to recent studies, more than 80% of all emails are spam, which costs businesses a staggering $20 billion every year. Spam is a serious and costly thing. It is no wonder why large companies, ISPs, and mail service providers are obsessed with preventing it from escalating. They tighten the rules to regulate spam activity, make filters aggressive and ruthless, and of course, regularly update domain blacklists…”
Source: unspam.email | Read full artcle