The flow I created was sending emails to me normally. However, today, upon checking the log for several contacts, they all show the following error:

"error": "Error: Message failed: 554 Message rejected: Sending paused for this account. For more information, please check the inbox of the email address associated with your AWS account.",
"transportConfig": {
"host": "email-smtp.eu-west-3.amazonaws.com",
"port": 587,
"auth": {
"user": "AKIAWZBP5N4KK2KMDG6M",
"pass": "**"