Sending newsletters is one of the most effective tools to maintain direct contact with your audience. Yet many website owners find themselves faced with the frustration of their emails ending up in the spam folder. That's why we thought we'd publish a practical guide on how to send emails without them going to spam.
Spam filters are incredibly useful, but they can hurt the open and conversion rates of legitimate services and promotions, derailing your marketing efforts. But why does this happen? And how can you avoid it?
Below we analyze the main reasons why a newsletter might be marked as spam and the strategies to ensure that your messages actually reach the recipient's primary inbox.
One of the most common reasons why emails are filtered as spam has to do with the configuration of the server from which they are sent.
If your website uses an improperly configured email service, email providers may interpret your messages as potentially dangerous.
Email authentication standards are essential tools to prevent your messages from being blocked:
Without proper configuration of these protocols, email providers may identify your newsletter as suspicious and automatically move it to the spam folder.
The IP address of the server from which you send emails directly affects the likelihood of your messages ending up in spam.
If you use a shared email service, your IP may have been flagged for spam by other users of the same platform.
You can check if your IP is in a blacklist using online tools such as:
If your IP has been flagged, you may need to request removal from blacklists or consider using an email provider with a more reliable infrastructure.
Spam filters analyze the content of emails for elements that might indicate spam. Some common errors include:
The use of terms such as free of charge, exclusive offer, click here, earn fast can activate spam filters. It is preferable to use natural and contextualized language.
An object like "BUY NOW!!!" may be immediately flagged as spam. Avoid excessive use of capital letters, exclamation points, or special symbols.
Inserting too many links or using shortened URLs (such as those generated by bit.ly or TinyURL) can make filters suspicious, especially if the destination domain is little-known or has been flagged as dangerous.
Sending too many newsletters in a short period of time can be interpreted by email providers as spam.
User behavior also has an impact!
If many people mark your emails as spam, your sender reputation will suffer.
If many people ignore or delete your emails without opening them, providers may consider them irrelevant and start filtering them.
Sending generic, impersonal emails increases the likelihood that users will ignore them or mark them as spam. Additionally, a low-quality contact list (e.g., purchased or out-of-date) can contain many invalid addresses, hurting your domain reputation.
A well-maintained contact database reduces the risk of your messages being perceived as unwanted.
One of the most important requirements of email marketing is that users can easily unsubscribe. If you don’t include a clearly visible unsubscribe link, users may report your newsletter as spam, damaging your domain’s reputation.
To comply with regulations (such as the GDPR in Europe and the CAN-SPAM Act in the United States), make sure that each email contains an unsubscribe link and that the process is simple and straightforward.
In summary, here are some concrete actions to reduce the risk of your newsletters ending up in spam:
By applying these best practices, you will improve the deliverability of your newsletters, increasing the likelihood that your messages will be read and generate interactions. If you don't know how to do it and you need advice on sending mass emails, contact us.
