Re: problem dealing w/ ietf.org mail servers

On 3 jul 2008, at 15:57, Jeroen Massar wrote:

> Which (autoconfig) you should either not be using on servers, or you  
> should be configuring your software properly to select the correct  
> outbound address.

Is it the IETF's job to tell people how to run their networks?

In my opinion, stateless autoconfig is a perfectly acceptable way to  
configure servers.

> SMTP shows that it is perfectly usable for these situations as it  
> nicely rejects the message with a proper message automatically  
> telling you on how to solve it.

I ran into the issue with the non-existant IPv6 reverse mapping twice.  
I would prefered to have solved this by getting proper delegation from  
my ISP, but I haven't been able to get this done for years.

Anyway, the first time I opened a ticket they told me it was fixed.  
Then the problem returned and they told me I was put on a whitelist.  
As this thread indicates, that's hardly a solution, especially since I  
was unable to get Sendmail to NOT use IPv6 without completely  
disabling the protocol on my system, making it completely impossible  
for me to deliver mail to the IETF servers. (Serves me right for  
running Sendmail I guess.)

> Those boxes are not set up correctly thus should not be sending  
> email in the first place. For that matter you should actually be  
> firewalling+logging port 25 outbound so you can monitor any host in  
> your network doing illegal SMTP connects.

In my opinion, filtering at layer 4 because a layer 7 protocol is  
broken is a bad idea.
_______________________________________________
Ietf mailing list
Ietf@ietf.org
https://www.ietf.org/mailman/listinfo/ietf