Also consider the expenses. Normally a cPanel server sends 1000 emails / hour. This might mean 20 000 emails and more every day. In terms of money can cost you additional $2-3/day to use SES for sending emails.
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Why you need them Amazon integration with cPanel/WHM ?
You can just set the SMTP access and send as many emails as you like (or the limit they have set for you).
Since I'd like to protect the sites I run. They're all run through cloudflare but since you can still find the origin server through email headers, I'd like to make all outgoing emails routed through AWS SES.