AWS

SESのBounceRateを下げる為のハック

・正常なアドレスにダミー送信することで全体の正常数をかさましすることで回避する

AWS Messaging & Targeting Blog

We recommend that you send at least 20 messages to “good addresses” for every one you send to a questionable address. This way, you’re makings sure that the bulk of your sending is to known good addresses that have not bounced, and to recipients you have recently engaged with. Meanwhile you dribble out a small flow of emails to the questionable addresses.If sending to these these questionable addresses result in bounces or complaints, remove the addresses from your list immediately and never send to them again. If your emails are delivered without incident, you can move them into your “good addresses” pool.Over time, as long as you also purge addresses that have not interacted with you in some time, you will end up with a list that you can feel safe sending to.

https://aws.amazon.com/jp/blogs

2012年の公式ブログ記事なので現状も有効かの確認をAWS技術サポートに確認したほうがよいかも😺