someone sent me an email and it has no email address, how did they do that and how do i find out who they are?
818982
This is a common thing that spammers do, it's called forging the header.  Spamcop.net can trace down to the ISP that was used to send the e-mail.
257311
If you don't have access to their computer (where you could always check the browser history), the only way is to google for their email adresses and commonly used nicknames.\n\nYou won't find everything this way, though.
720201
you can't, you don't even know this persons last name so obviously you aren't friends. if someone wants you to have their email address they will give it to you, if they didn't its probably because they prefer not to hear from you or have no idea who you are. sounds like with the lack of info you have you can carry on your life and think nothing more about this and you won't be missing anything!
832577
How To Find the Sender's Original\nIP Address Using Email Message Headers\nhttp://www.johnru.com/active-whois/trace-email.html
290194
There is no way to do it. All you can get is the ip of the originating email server and even that can be faked. If you own the first email server that the message was uploaded to, then you can get the ip addy of the sender if you were thinking ahead and configured logs right and if the sender wasn't a zombie or otherwise hacked. But if you could do that, then you wouldn't be asking this question on Yahoo! Answers.
466270
ask him. if it is unwanted email report as spam. if here is a harrassment you will have to file a report to police.
208107
Ok, if the email you recieved is an obvious "phishing" attempt, then you should consider the following steps:\n\n1)  Forward it to the fraud department of the company the spammer was attempting to impersonate\n\n2)  Contact the ISP (refer to the domain name in the email header) to report the sender\n\n3)  Send a copy to SPAM@UCE.GOV\n\n4)  Refer to sources section for more...
378770
Check the FULL headers in your "friend's" email. They will show his/her IP address. You can then trace their location using http://www.hostip.info/. I hope this helps
637846
Look at their profile.  Send an email and ask.\n\nIf you have an email from that person, look at the headers. It can contain some info.
181852
If u want the person not to see ur email contacts list Just rite his/her email address in the BCC column it will just  send the person a single copy without the name of the people to whom it wz also sent .
92245
ask him or her or find a  email address finder{ many free ones out there}
1085
may be u posted your email-id in some publicaly viewable page. Always use a format that is human readable but not machine readable like : \nme [at] acme [dot] com\ninstead of...\nme@acme...(dont want this id to be spammed :) )\n\nAlways take care of not giving email id to ne stranger. and DO not post it on net just for the sake of utting it.\n\nhope u get lesser spam.
450953
What's up with this person?  Love interest?  Friend?  Just got the address from another person?  Do you want me to email him/her and find out for you?  Are you capable of asking this person their gender?  What do you want from us?  Shouldn't you be able to do this alone?
42634
your best bet would be to search the net for the name of the person you are looking for and @hotmail.com\n\nif you have any luck, the person might have posted the email and his name on some webpage, forum, question etc.\n\nthere is no way you could get a list of emails and users from hotmail ... unless you'd have a friend at M$
973281
the user didnt verify their email...\n\n\nxoxo
300250
you can not follow the email sender information through inbox.ypu should go to yahoo memebers :\nmembers.yahoo.com\nand search for email address.it will bring you the profile of that person.
339156
Try doing an email look up or google the name on your search engine.\n\nHeres the site for looking up emails..\n\nhttp://www.email-lookup.com/