Barracuda / SMTP error code 450

smtp;450 cuda_nsu 4.7.1 <email@example.com>: Recipient address rejected: Policy Rejection- Abuse. Go away.

Medium severity

If you know the recipient personally, try reaching out through other means to confirm why the message was rejected (include the full source and headers of the rejected message). Only the recipient and their mailserver admin can resolve this bounce.

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Built with

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