无法使用Mailgun向自定义域（非gmail / hotmail电子邮件）发送电子邮件

Question

我在用户注册时发送确认（和其他电子邮件）。问题是，当我发送到不是gmail或hotmail或任何较大的电子邮件服务的地址时，它会在电子邮件标题中引发错误。

ORA-600 [4194] "Undo Record Number Mismatch While Adding Undo Record"    
VERSIONS:
    versions 6.0 to 10.1
    DESCRIPTION:
    A mismatch has been detected between Redo records and rollback (Undo)
    records.
    We are validating the Undo record number relating to the change being
    applied against the maximum undo record number recorded in the undo block.
    This error is reported when the validation fails.
    ARGUMENTS:
    Arg [a] Maximum Undo record number in Undo block
    Arg [b] Undo record number from Redo block
    FUNCTIONALITY:
    Kernel Transaction Undo called from Cache layer
    IMPACT:
    PROCESS FAILURE
    POSSIBLE ROLLBACK SEGMENT CORRUPTION

我是否错误地设置了标头，或者在我向自定义域发送电子邮件之前是否需要设置配置？

Answer 1

对某些电子邮件服务而言，它似乎需要有效的＆＃34;接收＆＃34;您的域/子域（对于Mailgun为mg.mydomain.com）的MX记录，以验证发件人的身份。我添加了MX记录

10 mxa.mailgun.org
10 mxb.mailgun.org

对于mg.mydomain.com而言似乎有效。