我有一个自定义构建的 Web 应用程序，可以发送电子邮件。此应用程序由第三方托管。此应用程序通过他们的服务器发送电子邮件。我已经正确设置了我的 spf 记录。但是，当我的应用程序发送电子邮件时，电子邮件收到 dkim 错误。我不知道为什么会收到此错误。您将在下面找到来自 Web 应用程序发送的电子邮件的一些元数据。
Delivered-To: test@holyfirepublishing.com
Received: by 10.12.180.68 with SMTP id e4csp2649123qvf;
Sun, 29 Apr 2018 07:12:41 -0700 (PDT)
X-Google-Smtp-Source: AB8JxZqDmZKGZ3MCbLlo7r0rfpdjBif9w8/vsXHKXx/+L+F5udEeQiZt97ERlXIYvazAodyXmjLk
X-Received: by 2002:a6b:98b:: with SMTP id 11-v6mr9699820ioj.90.1525011161636;
Sun, 29 Apr 2018 07:12:41 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1525011161; cv=none;
d=google.com; s=arc-20160816;
b=K8ytU3THBqD8rUY0aBaOCbH2SVUlVeVEJJXoYt7Z53oQA3wdldhpYToHrqxOuDg8Jo
lcQ1xqTYrh30FICoyOoRd+quDkQK5z//xlU1DXn753I+Tmc6aBBStMUMN7m3cGGWPW2j
bTGBeAzFlx1PGYSE+aIzPLcdfXPl6vVpMtVfeKnHf6LrcK35D2wBbG9o88q1xTOCZ9Ue
1fKI32QX7UgcT0zSrO4kLD9z1pS0jcYwS9wnbtAt5uVes+AyDjHR7YdSoUjT0SO5KVEc
JFwIndndrLH5XznWwfHdUq7IrLnLech7FToqGPujqS/Pz0RxXDu96yzuwX54z+exrfjj
JXWA==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
h=mime-version:to:from:subject:date:message-id:dkim-signature
:arc-authentication-results;
bh=uxadBWIDOxAaWOKJN8YSOnay3lDpPAaxgWm82T/s9FI=;
b=qZ9xPSGu6SztmcnDRkioXDL3BZcyOhdxQjECf441oe/vaLCWzxHtEfBJlO4+zo8vBa
/mij7vCitF2NFsh/yjCLxz/ellSuFfnDBc6ydOJ97t6X2y5eGVFREEDtTCigwi1exeQa
4+nU/ls3wvXuiU1vJo96z5RjebxCDd7wkVLu6W/7EPA3C7PYRbTQbJi2egI8Hoc0KORw
h7JaAwTfB787wdXnFuD72JT36LL52EjtSPUc4w7785VH49yH4rZhBeAFMU0JfAhoAu+3
YJIO5XP2+rK0b/ksfy1U+DoFW81LW4+CmnG89CLYHddlDUGyz956RGUVoqI+VcHsZsYJ
8sRw==
ARC-Authentication-Results: i=1; mx.google.com;
dkim=temperror (no key for signature) header.i=@holyfirepublishing.com header.s=default header.b=EXFzVKU0; …