Re: Relaying for legitimate downed hosts

Georg v.Zezschwitz said once upon a time:

>You should absolutely avoid using the From-Line. Some spammers used
>a sender adress like "1231233@???" for our mail-server (mail.pop.de)
>and that increased the trouble of cause even more. (It seems to be
>generated by the Spam-Software.

Obviously 1231233 is not a valid account on pop.de. What I was asking for
before is to use the From line to correlate to valid accounts.

>We use a list like this:
>
>sender_net_accept_relay = "/usr/local/lib/exim/netlist"
>
>containing all our ip-networks and some special customers that we wish
>to grant relaying even through other providers.

We're already using this, but it is a pain in the arse when you have 5000
customers to add each and every one who is using as a relay offsite.