·552-5.7.0 This message was blocked because its content presents a potential secu[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]
·伪装为IP黑名单解封提醒邮件满天飞[2016-5-17]
·邮件发送成功,对方收不到是什么原因?[2016-5-17]
·winmail如何让特定域名直接通过中继来发送?[2016-5-14]
·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]
·如何保护自己的域名不被伪造发送垃圾邮件?[2016-5-13]
·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]