Re: [Lilux-help] Weird headers @pt.lu

Hi, On Mon, 14 Jun 2004, henri (E-mail) wrote: Exactly what are you wondering about? In principle, email, or SMTP, is something very simple. When any application or person wants do deliver a mail, they connect to the target MTA (Mail Transfer Agent, aka mailserver), usually on port 25: telnet localhost 25 Now you tell the MTA where you are from (or pretend to be): HELO example.com And you follow up with your email address: MAIL FROM: <blah(a)example2.com> Note that here the domain can already be different from the one in the "HELO" command. Now you specify who the mail goes to: RCPT TO: <fasel(a)example3.com> This will normally be accepted only if the mailserver is a legitimate relay for your network (i.e. your ISPs mailserver) or if it is responsible for receiving mails for the example3.com domain. If this gets accepted, then you can deliver the mail body, which is essentially free text. Most of the time, some headers will be inserted, followed by an empty line, and then the "normal" mail body. This part is terminated by a line with only a dot: DATA Subject: whatever Date: yesterday From: saddam.hussein(a)gov.iq To: president(a)whitehouse.gov You SuXXorS! . And now you can deliver another mail, or simply disconnect: QUIT Greets & hth, Eric