Have you ever been surprised when you open your email inbox and what you can found at there is just useless and maybe dangerous mail? You don't need to be surprised and panic because your email got a spam attack. But, you also can panic because most of the spam mail that you receive contains dangerous content, like virus. This is when your antivirus takes an action to protect your computer. But, that's not the best solution for solving your spam problem. And it's often happen when your antivirus can't detect the virus that comes with the spam and let it through. And if this is happen, you will get more problems. So, the best solution is you need to block all of the spam that comes to your inbox. And for this reason, you need anti spam software.
Actually, every email server that you're using has their own spam filter. It can be helpful though, but, mostly it weak against high level dangerous spam. So, it makes an anti spam software is needed here. There are many software that can help you to filter spam. But, if you want to choose the best one, you need to choose the software that can give you protection for your entire computer. So, it's better if the software that you're using also can be function as the antivirus for your computer.
You can try the free version or paid version for the anti spam software that you need. Each of them has their own advantages. But, to make sure you get and use the best, you need to choose the software that suitable with your need, in this case your email server. So, you will fully protect from spam and the virus that mostly comes with spam mail. And if you have the best spam filter, you won't get any problem in your inbox.