标题: 邮件退信 [打印本页] 作者: bpmis163 时间: 2016-4-22 16:56 标题: 邮件退信 公司自建服务器，有做spf记录，有做PTR,发送QQ、163、126、sina等不退信，在kloth.net查询，没有列入黑名单，发送gmail及部分企业邮箱退信，不知道什么原因，发送gmail退信如下：1）
SMTP error, DOT: 550-5.7.1 [#### 12] Our system has detected that this message is
550-5.7.1 likely unsolicited mail. To reduce the amount of spam sent to Gmail,
550-5.7.1 this message has been blocked. Please visit
550 5.7.1 for more information. i9si2218624igh.31 - gsmtp
2）
SMTP error, DOT: 550-5.7.1 [116.7.240.234] The IP address sending this message does not have a
550-5.7.1 PTR record setup. As a policy, Gmail does not accept messages from
550-5.7.1 IPs with missing PTR records. Please visit