You can use the same AWS account for multiple brands in MailBluster, but only if all brands belong to the same MailBluster account. If Brand A and Brand B have different owners, you cannot connect the same AWS account to both.
To resolve this, contact the MailBluster Support Team to transfer brand ownership. Once both brands are under your account, you can easily use the same AWS account for multiple brands.
MailBluster allows one AWS account to manage multiple brands, which simplifies sending emails and managing settings. Make sure all brands are under your account before connecting the AWS account.