We're sending every 2 days about 600.000 emails. The last weeks we see that the inbox is getting much lower.
Are there tricks to be sure that all subcribers are getting our emails in their inbox?
Emails are not spam - are white hat offers
Assuming your using a pixel for open rates already (?)
Put a link in there and track ctr to yourlander.com too, lastly check if any IPs your sending the mail from are blacklisted/spamvertised...if using shared hosting you can get put on the bad list even if its not you sending the spam
1. check your email score at : https://www.mail-tester.com/
2. check your blacklisting if any : http://mxtoolbox.com/
if the user engagement with your email is negative your email starts delivering in spam.
Domain is ok
ip's are not blacklisted
sending from my own ips
More tips?
We had a big increase in the Inbox rate using the audit and whitelisting of Return Path... But its crazy expensive...