When receiving systems decide whether an email is going to be deleted, put in a junk folder, put in the main folder but without images displayed, or put in the main folder with images displayed, they could use several methods.
1. Look at the content of the email to see if it looks like spam.
2. Assess the reputation and source of the email (Intersoft).
3. Use other rules, like whether the recipient marked a previous similar message as junk.
'1' is the old fashioned way - but it's not reliable - lots of spam gets through (because spammers figure out what works), and lots of legitimate email gets marked as junk. Luckily fewer and fewer recipients use this method. That means that the content (banner images, for example), are less and less important.
'2' is the new way. About 1.5 billion Inboxes use this method, and it's here where Intersoft provides a distinct advantage to clients, because our emails avoid the junk mail folder for these Inboxes. Luckily, more and more companies and recipients are using the new way.
'3' is like a 2nd filter - the Inbox receives the email ok, but then the recipient marks it as junk, and subsequent emails from the same sender (e.g. your project) automatically go to junk. Some of this is unavoidable, but some of it you can avoid by sending fewer emails, and more relevant emails.
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