问题 提问于 2016年7月5日
Hi. All of a sudden I keep getting bounce back emails fropmk customers that I regularly contact on email. The message is: SMTP protocol diagnostic: 550 SC-004 (SNT004-MC4F48) Unfortunately, messages from 65.20.0.182 weren't sent. We recommend that you contact your Internet service provider. The problem is that too many unwanted messages have been sent from the following IP address above. I am not a spammer just a genuine business. Can some one help me to get unblocked. I am happy to enrol in the various programs etc. Thanks.
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