Spam Filter ISP Support Forum

  New Posts New Posts RSS Feed - Forward original IP
  FAQ FAQ  Forum Search   Register Register  Login Login

Forward original IP

 Post Reply Post Reply
Author
ecarbone View Drop Down
Newbie
Newbie
Avatar

Joined: 11 January 2014
Location: Mexico
Status: Offline
Points: 24
Post Options Post Options   Thanks (0) Thanks(0)   Quote ecarbone Quote  Post ReplyReply Direct Link To This Post Topic: Forward original IP
    Posted: 31 October 2014 at 3:54pm
Is it possible to forward the emails filtered thru SpamFilter using the original IP of the sender instead of SpamFilter-s IP.

We are doing filtering on behalf of our customers; but some of them still have internal filtering solutions and they would like to see the "real" IP who sent the e-mail instead of the IP of our SPAMFilter Server.

Regards,

   Enrique.
Enrique
Back to Top
LogSat View Drop Down
Admin Group
Admin Group
Avatar

Joined: 25 January 2005
Location: United States
Status: Offline
Points: 4068
Post Options Post Options   Thanks (0) Thanks(0)   Quote LogSat Quote  Post ReplyReply Direct Link To This Post Posted: 31 October 2014 at 4:19pm
Hi Enrique,

SpamFilter is not a proxy, as when it receives an email that is deemed "clean" it will modify it by adding some headers in it, and then will connect to your destination SMTP server(s) to deliver it. It will then wait before accepting the email from the sender until your SMTP server has fully accepted it, so as to practically eliminate all risk of backscatter. When doing this, SpamFilter is behaving as an actual email client, which requires an established TCP session between your destination SMTP server and the SpamFilter server. In the TCP session your SMTP server must see SpamFilter's true IP, otherwise the SMTP session will never be stablished.
Roberto Franceschetti

LogSat Software

Spam Filter ISP
Back to Top
ecarbone View Drop Down
Newbie
Newbie
Avatar

Joined: 11 January 2014
Location: Mexico
Status: Offline
Points: 24
Post Options Post Options   Thanks (0) Thanks(0)   Quote ecarbone Quote  Post ReplyReply Direct Link To This Post Posted: 31 October 2014 at 4:30pm
Is it possible to get from the Mail-Headers the Original sender IP? Which headers to look for?

Regards,

   Enrique
Enrique
Back to Top
LogSat View Drop Down
Admin Group
Admin Group
Avatar

Joined: 25 January 2005
Location: United States
Status: Offline
Points: 4068
Post Options Post Options   Thanks (0) Thanks(0)   Quote LogSat Quote  Post ReplyReply Direct Link To This Post Posted: 31 October 2014 at 5:01pm
Of course - it will be logged in two places. First, SpamFilter adds this "Received" header when it processes an email:

Received: from 66.231.95.252 by mail.netwide.net (SpamFilter ISP); Fri, 31 Oct 2014 13:39:06 -0400


In there it will indicate the IP address of the sender's server that made the connection to SpamFilter. In addition, it will add the following "X-SF-Originating-IP " header with the same IP:

X-SF-Originating-IP: 66.231.95.252


Roberto Franceschetti

LogSat Software

Spam Filter ISP
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.063 seconds.