Hi, On 1/31/10 5:17 PM, "Sven Eschenberg" <s...@whgl.uni-frankfurt.de> wrote:
> Dear Wael, > > In what way is blocking Port 25 any worse than blocking MX/root queries > for clients? Both solutions neglect the fact, that spam is not a technical > problem. This spam issue is major for DSPs and large ISPs. Their reputation is key in acquiring connections from some major international providers. This brings the issue to a very high priority for connectivity is the most important part. Blocking port 25 is much worse IMHO because it forces users out of the service, by restricting their ability to use their own mail servers that can be hosted externally. I believe good mail administrators will force SMTPS which uses a different port but then again a lot wont, and hence blocking SMTP service will deny all of these users from accessing their email servers and most of these users are not technically educated enough to find a workaround. On the other hand denying the dynamic user MX/root queries will affect users that have installed mail servers on their systems or otherwise infected and both of these scenarios are illegal for dynamically assigned IPs. > Some ISPs think it is a good idea to forward you to a search web page, > when you mispell some URL, this is done via DNS. Obviously, if the > customer dislikes this, the customer will (and can) use his/her own > recursor, We do not redirect users if they misspelled their destinations and we do not manipulate DNS replies in any way. Some users may choose to use their own installed DNS service, but then again if your service provider has a stable DNS service and a good and stable internet connection then would that overcome this disadvantage? At the end I think that something has to be sacrificed. Sincerely, Wael Shaheen _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users