An e-mail was sent to the high school drill team director.  I cannot
tell who is sending the e-mail.  How can you find out the source of
the e-mail.  The e-mail address is safetynetcinco@yahoo.com  ??  
Thanks.

Dear PGJ, 

With free email services like Yahoo!, Hotmail or Gmail, it is
sometimes impossible to determine who sent an email.

However, here are the steps you can do.

First of all, determine if this is the "real" email address. Some
spammers, scammers and stalkers (and I imagine there is a good reason
- harassment, hate-mail or fraud that would urge you to try to find
out who it is) try to disguise their actions by setting up "fake"
email addresses. In order to know what is the real (or original) email
address, you have to look at the "full header" of your email.

Here you can find information on how to find the full headers of your email: 
Accessing the Full Header for Email Troubleshooting 
<http://community.kavi.com/khelp/kmlm/user_help/html/access_full_header.html> 

After you have the "full headers", analyse them - to know who the read
sender is. You can use this guide:

SpamCop
<http://www.spamcop.net/fom-serve/cache/19.html> 

Or: 
Reading Email Headers 
<http://www.stopspam.org/email/headers.html> 

Or this one: 
Heinz Tschabitscher , "What Email Headers Can Tell You About the Origin of Spam" 
<http://email.about.com/cs/spamgeneral/a/spam_headers.htm> 

Or, download this software and use it. It is free in its trial version: 

email trackerpro
<http://www.emailtrackerpro.com/index.html> 

**

Now you have the "real" address and the IP of the sender. Now you are
in trouble. Unless there are other signs (or that you're very lucky
and the stalker did not disguise themselves very good), you're heading
for court: you'll have to get the company that hosts this email -
whether this is the ISP or a company like Yahoo!, that provides free
email accounts - to give you all of the information regarding this
email address.

You must understand, that ISPs and email providers are normally
committed to the privacy of their clients, and you'll have to convince
them (and the court) that there's a justification to violate their
privacy: for example, threats made from this email.

This actually means, that it would be wise to involve your local
police's computer crime division.

I hope that this answers your question. Please contact me if you need
any clarification on this answer before you rate it.

very good answer.  Thorough & complete.

Thank you for the rating. Good luck in finding out who's behind it.