无法使用Sendgrid SMPT向Java中的Outlook触发高优先级电子邮件

Question

无法使用Sendgrid SMPT触发高优先级电子邮件到Java中的Outlook  我在标题下面添加了

"X-Priority", "1"
"Priority", "urgent"
"Importance", "high"

即使从1更改为5仍与LOW PRIORITY相同，我仍然收到LOW PRIORITY电子邮件。

电子邮件配置：

public static final String HIGH_PRIORITY_EMAIL ="X-Priority";
public static final String PRIORITY_LEVEL ="1"; 
public static final String IMPORTANT_EMAIL ="Importance"; 
public static final String IMPORTANT_LEVEL ="high"; 
public static final String HIGH_PRIORITY_EMAIL_PROPERTY ="Priority";
public static final String HIGH_PRIORITY_LEVEL="urgent"`

HtmlEmail erroremail; 
erroremail = (HtmlEmail) MailUtils.getPreConfiguredEmail(); erroremail.addHeader(Constants.HIGH_PRIORITY_EMAIL,Constants.PRIORITY_LEVE); erroremail.addHeader(Constants.HIGH_PRIORITY_EMAIL_PROPERTY,Constants.HIGH_PRIORITY_LEVEL);
erroremail.addHeader(Constants.IMPORTANT_EMAIL, Constants.IMPORTANT_LEVEL); 
erroremail.send();

尽管我将标头设置为高优先级，而将电子邮件接收为低优先级。