private static bool IsSignatureRtf(Attachment attachment)
{
dynamic field = attachment.get_Fields(PR_ATTACH_METHOD);
if ((field != null) && ((int) field == ATTACH_OLE))
{
try
{
// Only allow file types we DON'T clean to be signatures.
if (FileTypeBridge.GetSupportedFileType(attachment.FileName) == FileType.Unknown)
{
Logger.LogInfo(string.Format("Signature {0} on Rtf formatted message", attachment.FileName));
return true;
}
}
catch (Exception)
{
// When the mail format is rtf you are unable access the filename property of embedded images.
return true;
}
}
return false;
}
private static bool IsSignatureHtml(Attachment attachment)
{
dynamic id = attachment.get_Fields(PR_ATTACH_CONTENT_ID);
dynamic idw = attachment.get_Fields(PR_ATTACH_CONTENT_ID_W);
string contentId = string.Empty;
if (id != null)
{
contentId = id.ToString();
}
string contentIdw = string.Empty;
if (idw != null)
{
contentIdw = idw.ToString();
}
if (!string.IsNullOrEmpty(contentId) || !string.IsNullOrEmpty(contentIdw))
{
// Only allow file types we DON'T clean to be signatures.
if (FileTypeBridge.GetSupportedFileType(attachment.FileName) == FileType.Unknown)
{
Logger.LogInfo(string.Format("Signature {0} on Html formatted message", attachment.FileName));
return true;
}
}
return false;
}