Aspose.Email for .NET 20.6 Release Notes

All Changes

Key Summary Category
EMAILNET-39778 Implement support for AQS search for EWS client Feature
EMAILNET-39844 Message to HTML - how to preserve embedded attachment’s icons and text Feature
EMAILNET-39852 Support for getting Email Category in MHTML Feature
EMAILNET-39835 Add overload for SaveAs with Stream input in PersonalStorage Enhancement
EMAILNET-39834 Add overload for MergeWith with Streams in PersonalStorage Enhancement
EMAILNET-39860 MapiCalendar does not have public property for organizer Enhancement
EMAILNET-39858 No messages are read from MBOX Enhancement
EMAILNET-39843 Text wrapping getting disturbed in case of lengthy CC/TO fields in exported PDF Enhancement
EMAILNET-39839 Table borders disappeared while converting msg Bug
EMAILNET-39871 Embedded images appearing in attachments of save MSG Bug
EMAILNET-39853 Attachments lost during Appointment to MapiCalendar conversion Bug
EMAILNET-39856 EML Content are not read properly Bug
EMAILNET-39865 NullReferenceException on extracting messages form PST Bug
EMAILNET-39686 Exchange.ListMessages returns nothing Bug
EMAILNET-39854 Incorrect PropertyDescriptor’s for the named properties in MapiMessage.Properties Bug
EMAILNET-39869 Parsing SOAP Fault message if an error occurs during EWSClient processing Bug
EMAILNET-39855 Exception on adding msg to PST Bug
EMAILNET-39861 MapiCalendar does not save Attendees to ICS Bug
EMAILNET-39842 Multipart/related part marked with content-dispotion attachment missing in MailMessage Bug

Advanced Query Search (AQS) search with EWSClient

Advanced Query Syntax (AQS) is the query syntax used by Exchange as an alternative to searching filters for expressing search criteria. AQS is a more flexible way to perform searches and deliver search results for all commonly used fields on the items. AQS is also user-friendly and easy to understand and quickly mastering. Using AQS is suitable for finding messages by attachments and recipients.

We have added the following classes to perform AQS search queries in Exchange:

  • ExchangeAdvancedSyntaxQueryBuilder - represents the builder of search expression based on the Advanced Query Syntax (AQS).
  • ExchangeAdvancedSyntaxMailQuery - implements an Advanced Query Syntax (AQS) search that is used by EWS.

Create a search query using query builder:

 using (IEWSClient client = EWSClient.GetEWSClient(exchangeMailboxUri, name, password))


    ExchangeAdvancedSyntaxQueryBuilder advancedBuilder = new ExchangeAdvancedSyntaxQueryBuilder();

    advancedBuilder.From.Equals("Jim Martin");



    ExchangeMessageInfoCollection messages = client.ListMessages(client.MailboxInfo.InboxUri, advancedBuilder.GetQuery());


Сreate a search query directly by using AQS:

  using (IEWSClient client = EWSClient.GetEWSClient(exchangeMailboxUri, name, password))


    ExchangeAdvancedSyntaxMailQuery query = new ExchangeAdvancedSyntaxMailQuery("subject:(product AND report)");

    ExchangeMessageInfoCollection messages = client.ListMessages(client.MailboxInfo.InboxUri, query);


See the syntax description.

Render custom icons in message attachment while HTML conversion

Sometimes, the message contains in-line attachments, that are shown up as icon images in a message body. Such messages may create problems while converting them to HTML, since the icon images are lost. This is because attachment’s icons are not held directly in the message.

We have fixed this problem so that the user can customize the icons for attachments when converting the message to HTML. For that, the HtmlSaveOptions.ResourceHtmlRendering event has been added added:

  var options = new HtmlSaveOptions();

options.ResourceHtmlRendering += SetAttachmentIcon;

options.ResourceRenderingMode = ResourceRenderingMode.SubstituteFromFile;

string fileName ="message.msg";

var mailMessage = MailMessage.Load(fileName);

mailMessage.Save(fileName + ".html", options);

 private static void SetAttachmentIcon(object sender, ResourceHtmlRenderingEventArgs e)


    AttachmentBase attachment = sender as AttachmentBase;

    e.Caption = attachment.ContentType.Name;

   if (attachment.ContentType.Name.EndsWith(".pdf"))


        e.PathToResourceFile = "pdf_icon.png";


   else if (attachment.ContentType.Name.EndsWith(".docx"))


        e.PathToResourceFile = "word_icon.jpg";


   else if (attachment.ContentType.Name.EndsWith(".jpg"))


        e.PathToResourceFile = "jpeg_icon.png";




        e.PathToResourceFile = "not_found_icon.png";



Get Email Category in MHTML

We have introduced the ability to add a category header while converting message to MHML.

 MapiMessage msg = new MapiMessage("", "", "subj", "body");

msg.Categories = new string[] { "Urgently", "Important" };

MhtSaveOptions saveOptions = new MhtSaveOptions();

saveOptions.FormatTemplates[MhtTemplateName.Categories] = saveOptions.FormatTemplates[MhtTemplateName.Categories].Replace("Categories", "Les catégories");


msg.Save(fileName + ".mhtml", saveOptions);