Originally Posted by pititis
You don't need do nothing. That message should be sent from mail-qe0-f49.google.com[18.104.22.168] to the sender.
I just noticed that it does, but after around 24-28 hours.
Is there any configuration issue here?
I would want the sender to get notified instantly!
Here is what I got in return.
This is an automatically generated Delivery Status Notification
THIS IS A WARNING MESSAGE ONLY.
YOU DO NOT NEED TO RESEND YOUR MESSAGE.
Delivery to the following recipient has been delayed:
Message will be retried for 1 more day(s)
Technical details of temporary failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain xxxx.re by mail.xxxx.re. [22.214.171.124].
The error that the other server returned was:
450 4.1.1 <email@example.com>: Recipient address rejected: User unknown in virtual mailbox table