Tips for Avoiding Anti-Spam Filters

So now when you know how most of anti-spam systems work, you can start on your HTML newsletter. You really have to “think like a spam filter” when you design your emails. Spam filters read your emails, and look for similarities with known spam. You don’t want to get thrown into the junk folder, right? So, you have to remember some things that you must not do when designing your email.

And the best way to learn what not to do is:

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All Subscribers Opened my Email

Open rates are tracked with the use of a transparent one pixel gif image hosted on a server and inserted into a HTML message just like usual images. Any action on the recipients’ part that leads to the image load is counted as an open. But this metric may not be accurate if:

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Why Subscribers Become Inactive

Some time later after the launch of your email marketing program you may discover (based on your campaign statistics) that some of your subscribers didn’t open any of your emails within a certain period of time. You would most likely wonder why. We believe that the causes of such inactivity may be the following (we don’t include bounced emails in this case):

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