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退信分析
552-5.7.0 This message was blocked because its content presents a potential security issue[2016-5-20]
Unable to find the recipients email server. The DNS query has failed[2016-5-20]
550 xu-hua@fagerdala.com.cn:domain locked[2016-5-20]
553 mail.amassfreight.com does not accept mail from[2016-5-19]
550 Not verified by SPF[2016-5-19]
554 5.7.1 : Recipient address rejected: Access denied[2016-5-19]
554 5.7.1 The message matches a profile the Internet community may consider spam[2016-5-19]
550 permanent failure for one or more recipients[2016-5-19]
550 5.7.1 Unable to deliver to[2016-5-19]
554 sender is rejected[2016-5-19]
554 5.7.1 You are not allowed to connect by Symantec Security Center[2016-5-18]
421 Read data from client error[2016-5-18]
550 SC-001 (COL004-MC6F26) Unfortunately, messages from xx weren't sent[2016-5-18]
553 you don't authenticate or the domain is not allowed relay[2016-5-14]
450 4.3.2 try again later[2016-5-14]
554 Transaction failed[2016-5-13]
451 4.7.0 Temporary server error. Please try again later. PRX4[2016-5-12]
There was a timeout while talking to the remote server[2016-5-12]
503 Error: need EHLO and AUTH first ![2016-5-12]
421 5.7.1 rejected[2016-5-12]
550 5.7.1 Recipient rejected (R4)[2016-5-11]
550 Unknown local part[2016-5-11]
550 Deliver to local org only[2016-5-11]
550 5.7.606 Access denied, banned sending IP[2016-5-11]
552 Message size exceeds maximum permitted;552 5.3.4 Error: message file too big[2016-5-10]
500 5.0.0 Service unavailable[2016-5-9]
501 This server will not accept forged credentials[2016-5-9]
550 Sender frequency limited[2016-5-9]
553 can't verify FROM domain in DNS；domain does not exist[2016-5-9]
450 Client host rejected: cannot find your hostname[2016-5-9]
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