Setting to Reject Messages from Non Validated Sender Addresses
When a message is submitted through the API using a non-validated sender address, the API currently returns a successful response even though the message will later fail delivery.
Consider adding an option to validate the sender address at submission time and reject requests that use non-validated senders, returning an appropriate error response. This would allow applications to immediately detect the issue instead of assuming the message was accepted and will be delivered.
This enhancement would improve transparency and reduce unnecessary failure notifications related to invalid sender addresses.
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Ivan
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