This is SCAM

IF you have received several e-mails claiming to be from UPS,or any others big parcel delivery service,there are most probably scam mail with virus attachment.  These e-mails came with attachments and claimed to have a tracking number.The attachments found in the zip format contain malware. The e-mails were mostly sent to yahoo mailbox ,I pretty sure it's is a scam since I never use for Yahoo mail to order a courier service, they weren't legit ,if you found one ,protect yourself,just placed the e-mails in the spam folder and report spam to the email service provider.

THE LETTER SOUND LIKE THIS: 

Hello! 

Unfortunately we were not able to deliver postal package sent on the 8th of December in time
because the recipient’s address is wrong.
Please print out the invoice copy attached and collect the package at our department.

United Parcel Service of America.

ups_print_label_xxxx.zip  <===============Virus files.