Email attachments maximum size

Hi all! I'm testing email attachments and I'm experiencing a strange behaviour. For jpeg images up to 2MB it works fine. However, when I'm trying to send an image of 5 or 10MB it fails without an indication of what has gone wrong. I can't see anything in logs. I'm attaching the screenshots from the activity feed. Is there any maximum size limit on Novu's side? I'm using Amazon's SES and localstack (instead of S3) for storage. Thanks!