how to open email attachments with "cid" prefixes ?

I get emails, which contain inline attachments, which are not direct hyperlinks, but are indirect references with a "cid" prefix (without quotes).   Example:   [cid:*** Email address is removed for privacy ***]
in a mail from Paramasivam,P <*** Email address is removed for privacy ***>, received on my Yahoo mail ID.   I checked in Google search, Bing, askme.com and Yahoo search; but am unable to find any information as to how to open the same.  I had sent a mail to the sender himself, asking for help in this regard; but unfortunately haven't got any reply from him so far.   From the rest of the mail, I can deduce that this refers to an image, with a joke about "Bumper Stickers on Senior Citizens".   While this attachment may not contain any important information, I get many mails with such inline attachments from various sources, quite a few of which may be important.  I am at afraid that I may be missing many essential information sent through such inline attachments.  Can anybody help me as to how I can open such a ink ASAP?
As I get many  such emails, on my different  mail accounts, I would be extremely grateful to one and all who can help me solve this problem, at an early date.
- - arasan77