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Old 08-30-2006, 08:28 AM   #7 (permalink)
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That's what I was worried about... The one thing that's been keeping me from thinking that is some messages do get through OK (especially the undeliverable ones ;-P )

Something we've noticed recently was that the only two relay servers that are returning the 554 error are MX01 and MX12.

Thanks for everyone's input!