protect emails from SPAM

How to protect business emails from spam in 2020.

It is almost impossible to think about email without considering the issue of spam.
We tried to summarize the current situation and the strategies that can be followed:

How much email traffic is spam?

A reputable source is SenderBase, now called Talos,
showing about 85% spam email and 15% legitimate email
compared to the email traffic recorded in September 2020.

This percentage has been stable, with little changes in the last twelve months.

email spam traffic September 2020

Source: Email & Spam Data - Total global email & spam volume.

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What are the costs of spam?

Sometimes spam is just for promotional purposes, and the sender
is merely trying to generate more customers for his business,
causing distractions and loss of time. It can fill your inbox
so that it’s difficult to find emails that are important.

Not all spam are friendly promotional emails.
There are many cases where the intentions are malicious, aiming to damage or hijack user systems.
The most common variants of malicious spam worldwide include trojans, spyware, and ransomware.

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What are the latest anti-spam techniques?

Imagine your company’s inboxes as your house door:
you have to decide who can come in and who you leave out.

No technique is a complete solution to the spam problem.
Each has trade-offs between incorrectly rejecting legitimate email (false positives)
as opposed to not rejecting of spam (false negatives)
and the associated costs in time, effort, and cost of wrongfully blocking good mail.

Anti-spam techniques can be broken into two areas: prevention and cure.

Spam prevention (before it happens)

Restrict the availability of your email addresses, with the goal of reducing the chance of receiving spam.

Spam cure (while it’s happening)

Once the spammers have your email address, the fight moves to your mail server and inbox.

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