And what good does finding the MX records for a domain have to do with knowing if received headers have traversed a valid sender IP address?
Next, this is easy to defeat, as I can simply toss in a legit received line from a real paypal mail. That is unless you mean the current host and not previous hops? --- Wakko Warner <[EMAIL PROTECTED]> wrote: > Marc Perkel wrote: > > Richard Clayton wrote: > > The sender is [EMAIL PROTECTED] > > But the sending server in the received lines is > accounting.paypal.com > > > > So - I want to grab just the "paypal.com" part can see if I can > find > > that in the received lines. It's part of my anti-phishing code. The > idea > > being that email from paypal.com will come from paypay servers > somewhere > > in received. > > What's so hard about this??? > > mx custserv.paypal.com. > > custserv.paypal.com does not exist, try again > mx accounting.paypal.com. > > accounting.paypal.com does not exist, try again > mx paypal.com. > > paypal.com MX 10 smtp1.sc5.paypal.com > > paypal.com MX 10 smtp2.nix.paypal.com > > paypal.com MX 10 smtp1.nix.paypal.com > mx com. > > com MX record currently not present > > Just strip the subdomain off until you get an MX. How difficult > could that > be??? You can do this with embedded perl and it would be quite easy > to do. > > Or you could compare all MX's > > If you're wondering about say demon.co.uk: > mx demon.co.uk. > > demon.co.uk MX 5 lon1-hub-internal.mail.demon.net > > demon.co.uk MX 5 > anchor-hub-internal.mail.demon.net > mx co.uk. > > co.uk MX record currently not present > mx uk. > > uk MX record currently not present > > I use a trailing . to force it not to look the domain up by using my > local > domain in /etc/resolv.conf > > -- > Lab tests show that use of micro$oft causes cancer in lab animals > Got Gas??? > > -- > ## List details at http://www.exim.org/mailman/listinfo/exim-users > ## Exim details at http://www.exim.org/ > ## Please use the Wiki with this list - http://www.exim.org/eximwiki/ > -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
