记一次邮件不能正常发出提示lost connection with smtp2.loreal.com[81.255.155.128] while sending MAIL FROM的问题
某天,收到同事告知她要发送邮件到xxx@loreal.com,但是无法发出,查询日志得到以下记录:
Dec 18 10:15:54 mail postfix/smtp[8589]: 1ADFF1163B3E: to=<Pornchanok.KARWKIJPRASERT@loreal.com>, relay=smtp2.loreal.com[81.255.155.128]:25, delay=5, delays=0.01/0.01/4.9/0, dsn=4.4.2, status=deferred (lost connection with smtp2.loreal.com[81.255.155.128] while sending MAIL FROM)
网上搜索了半天,以及群里问问其他人,没搞明白为何会出现 lost connection with smtp2.loreal.com[81.255.155.128] while sending MAIL FROM,使用http://multirbl.valli.org/和https://mxtoolbox.com/SuperTool.aspx 也没查出我的邮件服务器IP被加入任何黑名单里,这就奇怪了。
中间这里就是一系列的搜索找资料的过程,balabala....
最后我想在服务器上尝试使用telnet直接向目标收件人发看行不行,不试不知道,一试吓一跳,这里面直接给我报出来了我被加入黑名单了,日志里面居然没有报出来,这TM隐藏的太深了,那好吧,提交申请解除。
# telnet 81.255.154.128 25 Trying 81.255.154.128... Connected to 81.255.154.128. Escape character is '^]'. 220 SMTP Ready helo 501 Syntax: HELO hostname HELO MAIL.CHENXIE.NET 250 SMTPMF1B.loreal.com mail from:<x.chen@qoooc.com> 250 2.1.0 Ok rcpt to:<Pornchanok.KARWKIJPRASERT@loreal.com> 550 Service unavailable; Client Host [47.52.253.75] blocked using Trend Micro RBL+. Please see http://www.mail-abuse.com/cgi-bin/lookup?ip_address=47.52.253.75 Connection closed by foreign host.
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