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by Neil44
2612 days ago
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Bounce handling depends on the error code, 5xx is usually a permanent error so the bounce is immediate. Mailbox doesn't exist etc. Its not going to exist later either. IIRC 4xx is effectively try again later because something is wrong right now that might get fixed. Mail server out of disk space, you're greylisted etc. So try again later. Those can take a few days to give up retrying. |
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