Comment by elliotkillick

How did you justify paying $6,000/year for a dedicated IP address? SES will provide you with the same thing for $25/month (https://aws.amazon.com/ses/pricing/#Amazon_SES_Pricing). I noticed your statistics didn't include SES. To me, mystery surrounding reliable email deliverability is primarily a tactic some vendors use to entice non-technical people into relying on their proprietary email marketing solution.