PHP mail and regular mail?

[Virtuoso]

How is someone supposed to tell the difference between the mail() and if someone sends a real mail?
Can't people just send spam emails using other people's names?
ex:

Code: Select all

<?php
mail ('someone@someone.com','account information',"Your account's to be terminated by me within 5 days.",'From: bgates@microsoft.com')
?>

[sadisticmachine]

I think careful header examination could prove where the mail came from, but I just tested that code, and I sent myself mail from Bill.

EDIT:

Code: Select all

Return-Path: <anonymous@st36.startlogic.com>
Received: from st36.startlogic.com ([66.235.212.136])
   by mx-a065b19.pas.sa.earthlink.net (EarthLink SMTP Server) with SMTP id 1dxsRx6S43NZFpO1
   for <sadmac@earthlink.net>; Sun, 15 May 2005 16:49:35 -0700 (PDT)
Received: (qmail 44556 invoked by uid 80); 15 May 2005 23:47:43 -0000
Date: 15 May 2005 23:47:43 -0000
Message-ID: <20050515234743.44555.qmail@st36.startlogic.com>
To: sadmac@earthlink.net
Subject: account information
From: bgates@microsoft.com
X-ELNK-AV: 0


There's some evidence, as you see, of where the mail came from. a few more header parameters could make some of that go away, but there is a sure way to verify the domain/ip.

[WiZARD]

How is someone supposed to tell the difference between the mail() and if someone sends a real mail?
Can't people just send spam emails using other people's names?
ex:

Code: Select all

<?php
mail ('someone@someone.com','account information',"Your account's to be terminated by me within 5 days.",'From: bgates@microsoft.com')
?>

If you find free SMTP server yes you are can do it SPAMming, but I'm not recommend it cuz if you are catched you are prisoner.

[Virtuoso]

I can just use my computer to send emails. How do I know if its SMTP server?
I'm just interested in this topic becuase I got some returned failed deliverly mail from someone I never sent a mail to.

[Alexei Kubarev]

its a fraud..

[WiZARD]

I can just use my computer to send emails. How do I know if its SMTP server?
I'm just interested in this topic becuase I got some returned failed deliverly mail from someone I never sent a mail to.

http://www.softstack.com/freesmtp.html
http://www.thebestfree.net/free/freesmtp.htm

used google.com