What is SMTP server and how it works?

Email is a many-splendored thing. Without it, you might never have reached that job interview, started that romantic relationship, or even gotten your latest order. It's been around for decades and has become a vital part of daily life — at least until recently. Spammers have created email servers that can easily evade the Internet's spam filters after they are copied to another email server. These servers should not be confused with the SMTP server which allows you to send email messages in exchange for a fee over an ordinary internet connection instead of a dedicated one like your ISP (Internet Service Provider).