Hey,
i have the following issue with a customer:
The customer get an email from an external sender like:
- sender: test@example.com
- recipients: 1@customer.com;2@customner.com;3@customer.com etc.
In the example the accounts 1 and 2 exist and 3 is a non existing address.
We have enabled Recipient Filtering / Recipient Vaildation and the example mail above get defered because of the non existing address 3@customer.com. the recipients 1 and 2 did also not receive this email. How can we change this behaviour? 1 and 2 should get this mail and for 3 there should be an 550 user unknown or in this case an ndr, since the mail object contains other valid recipients.
Also, i've noticed that some mails get discarded with "user unknown", although the recipient exists. How can that be?