The API allows you to add watermark to all the attachments of supported types in an email message as shown in the following code sample.
advanced_usage.add_watermarks_to_email_attachments.EmailAddWatermarkToAllAttachments
TextWatermark watermark = New TextWatermark("Test watermark", New Font("Arial", 19)); EmailLoadOptions loadOptions = New EmailLoadOptions(); // Specify an absolute or relative path to your document. Ex: "C:\\Docs\\message.msg" Watermarker watermarker = New Watermarker("message.msg", loadOptions); EmailContent content = watermarker.getContent(EmailContent.class); for (EmailAttachment attachment : content.getAttachments()) { // Check if the attached file is supported by GroupDocs....Consulting Blog Knowledge Base New Releases Status Websites aspose...watermark = new TextWatermark ( "Test watermark" , new Font ( "Arial"...