[izgzhen]

Speaking from personal experiences on non-dedicated IP plans on both SendGrid and SES, SES is much better in deliverability of transactional emails, esp. when sent to .edu domains.

I felt like SES is more careful in vetting their customers to prevent shared IPs being polluted.

[bombcar]

I feel administrators for EDUs (for example) know how to easily block all of sendgrid or mailchimp but don’t know how to block all of SES without blocking the Dean’s Amazon receipts.

[izgzhen]

FWIW EDUs typically use an external service like https://www.barracudacentral.org/rbl