Add watermarks to email attachments

TextWatermark watermark = new TextWatermark("Test watermark", new Font("Arial", 19));                  
EmailLoadOptions loadOptions = new EmailLoadOptions();                                                 
// Constants.InMessageMsg is an absolute or relative path to your document. Ex: "C:\\Docs\\message.msg"
Watermarker watermarker = new Watermarker(Constants.InMessageMsg, loadOptions);                        
                                                                                                       
EmailContent content = watermarker.getContent(EmailContent.class);                                     
for (EmailAttachment attachment : content.getAttachments())                                            
{                                                                                                      
    // Check if the attached file is supported by GroupDocs.Watermark                                  
    IDocumentInfo info = attachment.getDocumentInfo();                                                 
    if (info.getFileType() != FileType.Unknown && !info.isEncrypted())                                 
    {                                                                                                  
        // Load the attached document                                                                  
        Watermarker attachedWatermarker = attachment.createWatermarker();                              
                                                                                                       
        // Add watermark                                                                               
        attachedWatermarker.add(watermark);                                                            
                                                                                                       
        // Save changes in the attached file                                                           
        attachment.updateContent(attachedWatermarker);                                                 
                                                                                                       
        attachedWatermarker.close();                                                                   
    }                                                                                                  
}                                                                                                      
                                                                                                       
// Save changes                                                                                        
watermarker.save(Constants.OutMessageMsg);                                                             
                                                                                                       
watermarker.close();