How do spam filters work?

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Bappy10
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Joined: Sat Dec 21, 2024 5:32 am

How do spam filters work?

Post by Bappy10 »

Cold email campaigns tend to give good results when you want to attract the attention of a person who is not familiar with your products or services, but who, due to their profile, could be a potential buyer.

Being unsolicited and certainly surprising emails, they run the risk of being sent to the spam folder or being filtered as such automatically by servers.

Given this possible scenario, in this article we will explain how email filters work and give you 5 tips to prevent your cold emails from being considered SPAM.


A cold email is considered SPAM (unsolicited junk mail) when it poland number for whatsapp engages in practices that are prohibited by Internet providers, companies that offer email services (Google, Yahoo, Microsoft) and government offices for citizen security.

For example, emails that are intended to scam the recipient by obtaining sensitive information, such as bank account login details, are often sent to the spam folder. Thus, anti-spam filters are important and definitely necessary.

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Anti-spam filters work through algorithms that classify information according to criteria that determine (or not) the quality of an email. These criteria are assigned a score and based on the results of an email, it is automatically decided whether it is spam or not.

Each antispam software, Internet provider or email provider prioritizes certain scoring criteria and restriction levels over others. This means that the same email can pass through the antispam filter and reach the inbox, while being considered illegitimate by another provider.

However, one can speak of standard criteria…

criterios-que-los-filtros-anti-spam-usan-para-puntuar-emails

In this way, we can say that an email was considered spam just for having a suspicious subject or HTML code. The classification as spam depends on all these factors and is based on scores: the higher the score, the greater the probability of being classified as spam.

Based on these criteria, we are going to give you the following recommendations so that your cold emails do not end up in the spam folder:

1. Validate your email
The first thing you need to do is validate your email so that the servers can confirm that you are who you say you are. To do this, implement the SPF, DKIM and DMARC self-identification records or protocols.

SPF (Sender Policy Framework)
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