Spam Is Bad For Your Email
Spam is the abuse of electronic messaging systems (including most broadcast mediums and digital delivery systems) to send unsolicited bulk messages indiscriminately. Spam, or unsolicited mail, is infuriating. It abuses a service, floods your email account with illegitimate mail, steals your resources and generally wastes your time and money.
Spam mutates every second of every minute, every day. You may already have anti spam software installed in your mail server, or expensive hardware that installs updates daily into your mail server. Nowadays, this software and hardware works on "signature", which requires updating continually. Initially it filters spam with up to 50-80% accuracy, but as time goes by, its performance will degrade exponentially as spam mutates every minute.
Everyday, there are new phishings, malwares, ransomwares, viruses. Waiting for updates means it's too late.