mscorlib-4.0-offline-doxygenated-documentation/html/_mail_priority_8cs_source.html

 namespace System.Net.Mail
 {
     public enum MailPriority
     {
         Normal,
         Low,
         High
     }
 }
System.Net.Mail.MailPriority
MailPriority
Specifies the priority of a T:System.Net.Mail.MailMessage.
Definition: MailPriority.cs:4

System.Net.Mail
Definition: _METADATA_HANDLE_INFO.cs:3

System.Net.Mail.MailPriority.Low
The email has low priority.