The spam and spam fighting is a critical game which is just like played by tom & jerry, in cartoon. The all spammers try different ways to get into your inbox and if they do then surely you fall in trouble. But the best thing is that, you didn’t have to worry about the spam messages because here I mention some of the pretty points which help you to solve your spam issue.
1) If you sending mails to inactive contacts and they will not open email, then the ISP considered that your email is unwanted and deliver it on spam folder.
2) Always focus on your content which is fresh and interesting so that ISP never considered it as a spam
3) You have to send only more personalized email, targeted email because big batches of email are always considered as spam.
4) Suppose you have a larger list, so it is necessary to find right sending frequency.
5) Suppose if you send any mail which contains graphics then surely it harms you and considered your mail as spam. The good rule is, there is balanced mix of images and text.