Avoid these words in email marketing, to avoid spam filters

Spam filters check your emails for words which indicate possible spam content, e.g. “free offer”. Avoid these words in email marketing to avoid spam filters.

You marketing email has to cross many hurdles before it can safely land in the inbox. Apart from your sender reputation score, your email text is also an important factor to decide whether or not it will reach inbox.

You can stagger your emails to improve email deliverability, restrict your email sending volumes, maintain high sender reputation, but if your email content is spammy, you will still struggle to reach inbox.

So what qualifies as spammy content?

Spam filters have identified certain words to be indicators of spam emails. If your email text contains many of these keywords, it can trigger an action by the spam filters.

SPAM trigger words

Based on a history of spammy email content, email service providers maintain a blacklist of sorts for spam trigger words. Here is an exhaustive list of such spam trigger keywords for different categories of emails.

That list can be quite handful. So we put all those words in a user friendly spreadsheet, so that you can easily and quickly find out, which words to avoid in your marketing email to avoid the spam filters.

spam trigger words to avoid in email marketing

How to avoid spam trigger words

Email marketers often wonder if they need to avoid these words altogether in their emails. Because getting rid of all those words can also make your marketing email quite ineffective.

But you don’t need to worry, as spam filters have also become quite smart over the years. They can analyse the context of your text and they will only punish your email text if the trigger words seem to be used out of context.

I know, it sounds quite vague. What is the right context? And how do you make sure your email has the right context?

Spam filters will check if your emails are genuinely adding any value to the recipients and don’t have a pushy, salesy, sketchy tone.

For example, a heavily used word by spammers is “Free membership”. Does that mean you should never use the word “Free membership”? Not necessarily, it depends on the context.

If your email is only trying to shove a ‘Free membership’ down the throat of your readers, then it is an obvious flag for spam. The context here is a free membership that may not be useful for the recipient, which is evident from low opening rates for other similar emails.

But if you are sending an email to someone informing that their ‘free membership’ has expired, that is a genuine message which must reach the recipient. This will not be blocked in spam. Here, the context is a genuine message which the recipient would like to know about – again evident by the opening rates of similar emails.

Note that the spam filters base most of these inferences on an ocean of email opening data accumulated over the years. That is what makes them smart.

How to write an email that gets delivered and opened

First challenge is to land your email in inbox. Here are some things that you should do to improve and maintain the deliverability of your emails

  • Never buy a mailing list. You don’t know of the quality or authenticity of these emails and you will end up with too many bounced emails.
  • Set up separate domain and email addresses for marketing purposes. You minimize the risk of damaging your main domain reputation, in case your emails get marked as spam.
  • Avoid sending bulk email blasts. They increase the likelihood of getting filtered by ISPs. Instead use a cold email automation tools like this one, to help you avoid the spam filter.
  • Ensure high opening rates for your campaigns by recycling the contacts who have become less interested in what you have to say. This will help in maintaining high sender reputation.

Once your email has reached the inbox, it is up to the subject line and email text to get a response. Here are some tips to ensure that –

  • Always A-B test your subject line. There are certain common guidelines for writing subject lines that get clicked. But it is often difficult to predict beforehand which subject line is going to draw more interest. So to be completely sure, test different subject lines with 10% of your mailing list, before you set up the final email campaign.
  • Invest more time and thought in writing emails that your audience will find interesting. As we already saw, the context and the tone of your email can make or break the success of your campaign.

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