When you create a new AWS account, you must add a valid payment card for verification. Amazon makes a temporary $1.00 authorization charge to confirm that your card is valid and active. The charge disappears within three to five business days. For prepaid cards, the amount may vary slightly.
You also need to activate your AWS account by verifying your email address and mobile number. And AWS will deduct $1.00 from your card after verifying it. If all these goes well, your AWS account will be activated.
When you start to use Amazon SES, you will be in Free Tier with a limit of 3000 emails per month upto 1 year. Once you exceed this limit, Amazon SES will most likely charge you $0.10 for every 1000 emails you send from your AWS Account. This charge is solely part of Amazon Web Services, not MailBluster.