omhost.net. 300 IN TXT "v=spf1 include:199903.xyz ?all"
DKIM记录:
xyamail._domainkey.omhost.net. 300 IN TXT "v=DKIM1;h=sha256;k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv7IptZ6K5B4MMkQDMmaRfqNznAwSGa4Ci3ejCKo8YlGzC/ClMleZ1Nlz9hehAn7s/L5uxJ9+kxMqg7nhZxTpmdw4yCi+bUDjOeevkssQ/WjBTlBhlN7Rc4COMmUGeR6m4+RrVgj0Iqiycpz3EwaYFIJnTW77bH5L8LMozmyP4zbh9N3fDyi4LRMp4w" "OD9uzo9U7T0em6A6o2Myfbd55mvChdJpJvA5N8o8th8qPjDFZcu8MxNvV+bQst6CNr+3Cm1IuakigFznzCZq7zAqRt0V9N86aYVkFqqsOnAOU9mAPN3WWG+1ilq1kizDGlhL8vWjl/Tbg3yxdCwQtCx+7H6wIDAQAB"
DMARC记录:
_dmarc.omhost.net. 300 IN TXT "v=DMARC1; p=none;"
在设置好这些DNS记录后,发信到大多数邮局是没有问题的。当然,少数邮局除外。比如,outlook对第一次发信的sender,大概率标记为垃圾邮件,需要你手工去确认一下this is not spam,训练它的贝叶斯来改进准确率。再比如,t-online.de采用白名单机制,你的域名和IP要先找他们申请白名单,才能发信进去。