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    I am sending a mass email. How do I prevent them from getting spammed?

    I understand very well your question as I got the same problem I sent 139. emails grouped by 3. each 10 seconds. All but one have been sent But I receiver 40 mail delivery subsystem messages as mail rejected "Ofr 506. or 416. or 550 spam detected ???? "How can enter the right setting to avoid...
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