What do content filters look for?
Content filters look at a wide variety of things from the domain you are sending from, to words in your content like Viagra, Spam, Free, Drugs, Credit, Casino, Debt, etc. to the html code itself. If you have a blacklisted domain in your html, even if it’s not the same as the one you are using to send the email, it might get flagged as spam. It also looks at the html code, so try to avoid calling any image files ‘casino.gif’. ISPs use content filters in different ways and some will bypass this process altogether if your address is in the recipient’s ‘Safe’ list which is why it is so important to include whitelisting instructions in your emails and also during your signup process. A great way to do this is to send each new signup a Welcome email and ask them to whitelist your address immediately. If you are signing up people legitimately and they want to receive your emails, they should have no problem with this. Many of our pre-designed templates already include text such as ‘This messa
