Two days ago, I received this email purporting to be from DHL. (click on the image)
There were tell-tale signs aside from the fact that it did not contain an accurate logo of DHL (but even if it did, it wouldn't necessarily mean it is authentic as it can easily be done in photoshop). There were several addressees - that is, it was sent to several people and not only to me. I do not know who owns the other email addresses. If it were real, it would have been sent to me alone. Then, the notice does not contain my complete name. It would have indicated my name in the notice if it was indeed for me.
There was also an attached file. Beware of the attached file though. It could contain trojan viruses or any other unwanted programs that can mess up your computer, at least, or give some people access to your files. Just delete the e-mail and ignore it altogether.
Other variations:
Some emails might say that there was failure to deliver the item to your address and you are asked to follow their instructions (may or may not include downloading of attached files or visiting a site).
Then, some emails use UPS or DHL as supposed courier.
Please do not be fooled. There are other ways of verifying if there was indeed a parcel for you. Just contact the courier. (But most likely, if you were not expecting anything and you received email similar to this, it's probably fake.)