Improving email delivery is a key issue especially in ecommerce. But before wondering how and what to optimize, first is to get a good picture of what is happening and what goes wrong. Following good practices is obviously a good rule to follow but implementing DKIM, SPF and DMARC can also help improving email delivery rate at this stage.
DMARC helps you know what ISPs know about the incoming emails and why they should deliver these emails. Once activated, supporting ISPs automatically send you reports of incoming emails received. Reports refer on your SPF and DKIM records. Fine tuning these records will help reducing spammy emails and, in the end, improve your sender reputation which leads to better email delivery rates.
Eliminating spoofing reduces risk of being considered as a spammer. Continue reading Understanding and improving email delivery