Does SES have any threshold on the no of incoming emails

    Amazon SES (Simple Email Service) does not have a specific threshold or quota for incoming emails like it does for outgoing emails. The documentation primarily focuses on sending quotas and limits, which are designed to regulate the number of outgoing emails and the rate at which they can be sent.

    For outgoing emails, SES imposes limits such as a maximum daily send quota and a maximum sending rate. These quotas help maintain a trusted relationship with email providers and prevent sudden spikes in email volume that could be flagged as suspicious.

    However, when it comes to incoming emails, there is no mention of similar quotas or thresholds in the provided information. SES is designed to handle incoming email, but the service doesn't appear to place specific numerical limits on the volume of emails you can receive.

    It's important to note that while there may not be explicit incoming email thresholds, other factors could potentially affect email reception, such as overall AWS account limits or the capacity of any integrated systems you're using to process incoming emails. If you have specific concerns about high volumes of incoming email, it would be best to consult with AWS support for more detailed information tailored to your use case.
  

Sources
Managing your Amazon SES sending limits - Amazon Simple Email Service
Managing your Amazon SES sending quotas - Amazon Simple Email Service
Understanding email deliverability in Amazon SES - Amazon Simple Email Service