我可以理解的是,您在存档服务器上的某处有现有的电子邮件,并且您希望将它们导入您的 Outlook Online 或 Outlook Office 365。
您可以使用 Exchange WebServices 并导入导出的电子邮件。大多数电子邮件可以通过 .eml 或 .msg 格式导入。我可以为您提供 .eml 文件的指导。
在您的存档服务器上,您可以获得电子邮件的 .eml 文件备份,或者您可以通过从 Outlook 桌面/Mozilla Thunderbird 导出电子邮件来生成一个备份以用于测试目的。
现在您可以使用 Nuget 包 Microsoft.Exchange.WebServices,它实际上是 Microsoft Exchange WebServices 的托管 API
您可以使用以下代码
void main()
{
ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP2);
// Get the information of the account
service.Credentials = new WebCredentials("account email here", "account password here");
service.AutodiscoverUrl("account email here", RedirectionUrlValidationCallback);
UploadMIMEEmail(service);
}
public static bool RedirectionUrlValidationCallback(string redirectionUrl)
{
// The default for the validation callback is to reject the URL.
bool result = false;
Uri redirectionUri = new Uri(redirectionUrl);
// Validate the contents of the redirection URL. In this simple validation
// callback, the redirection URL is considered valid if it is using HTTPS
// to encrypt the authentication credentials.
if (redirectionUri.Scheme == "https")
{
result = true;
}
return result;
}
private static void UploadMIMEEmail(ExchangeService service)
{
EmailMessage email = new EmailMessage(service);
string emlFileName = @"E:\asad.eml";
using (FileStream fs = new FileStream(emlFileName, FileMode.Open, FileAccess.Read))
{
byte[] bytes = new byte[fs.Length];
int numBytesToRead = (int)fs.Length;
int numBytesRead = 0;
while (numBytesToRead > 0)
{
int n = fs.Read(bytes, numBytesRead, numBytesToRead);
if (n == 0)
break;
numBytesRead += n;
numBytesToRead -= n;
}
// Set the contents of the .eml file to the MimeContent property.
email.MimeContent = new MimeContent("UTF-8", bytes);
}
// Indicate that this email is not a draft. Otherwise, the email will appear as a
// draft to clients.
ExtendedPropertyDefinition PR_MESSAGE_FLAGS_msgflag_read = new ExtendedPropertyDefinition(3591, MapiPropertyType.Integer);
email.SetExtendedProperty(PR_MESSAGE_FLAGS_msgflag_read, 1);
// This results in a CreateItem call to EWS. The email will be saved in the Inbox folder.
email.Save(WellKnownFolderName.Inbox);
}
此方法的作用是将电子邮件作为导入的电子邮件上传到交换服务器,其中所有电子邮件数据与导出的 .eml 中完全相同。
如果您交换服务器在本地/域内运行,那么您还可以通过以下方式指定交换 URL
service.Url = new Uri("https://computername.domain.contoso.com/EWS/Exchange.asmx");
此外,如果您想使用默认凭据登录,那么您可以指定
service.UseDefaultCredentials = true;
更多信息您可以关注
https://msdn.microsoft.com/en-us/library/office/dn672319(v=exchg.150).aspx#bk_importproperties
https://code.msdn.microsoft.com/how-to-import-vcard-files-ffa0ff50