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Plusnet Email servers giving random SMTP 550 errors for inbound emails

Superuser
Superuser
Posts: 14,367
Thanks: 5,389
Fixes: 31
Registered: ‎22-08-2007

Re: Plusnet Email servers giving random SMTP 550 errors for inbound emails

All domain names are checked, not just for spam purposes but to ensure that ANY failure message can be sent.

The 0.03% figure refers to the number still failing after multiple retries compared to all emails successfully processed.