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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
550 5.7.1 information. s64si5083856pfj.65 - gsmtp
请哪位指点下,服务器明明已经做了PTR及黑名单中,为什么还会退信,以及该如何解决,谢谢!!!
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