Hi
Recently i got a mail with

X-Originating-IP: [61.0.45.38]
Return-Path: <[email protected]>
From: [email protected]
To: [email protected]
Subject: Mail Delivery (failure [email protected])

Message :
If the message will not displayed automatically,
follow the link to read the delivered message.
Received message is available at:
"www.yahoo.com/inbox/username/read.php?sessionid-25114"

But the link actually points to address mentioned below

"http://mail.yahoo.com/config/login?/cid:111346090:/ym/us/ShowLetter?box=Inbox&MsgId=3067_6097726_1481_1012_794_0_44120_1581_3271377446&bodyPart=2&YY=37512&order=down&sort=date&pos=0"

What is "cid:111346090", any kind of identifier or counter

What is the purpose, any ideas of this mail as normally spams ihave seen are for selling some product or something but this one?