Outgoing SMTP Servers

Aftab Siddiqui aftab.siddiqui at gmail.com
Tue Oct 25 04:51:05 CDT 2011


Blocking port/25 is a common practice (!= best practice) for home
users/consumers because it makes life a bit simpler in educating the end
user.

ripe-409 gives some what glimpse of best-practice, not sure how many
implements it that way.

Regards,

Aftab A. Siddiqui


On Tue, Oct 25, 2011 at 2:35 PM, Owen DeLong <owen at delong.com> wrote:

>
> On Oct 24, 2011, at 10:27 PM, Mikael Abrahamsson wrote:
>
> > On Mon, 24 Oct 2011, Dennis Burgess wrote:
> >
> >> I am curious about what network operators are doing with outbound SMTP
> >> traffic.
> >
> > Block all TCP/25 and require users to use submit with authentication on
> TCP/587.
> >
>
> If they are using someone else's mail server for outbound, how, exactly do
> you control
> whether or not they use AUTH in the process?
>
> Further, if you make them use AUTH somehow, but, you don't force TLS, then,
> you are
> doing more harm than good IMHO.
>
> Owen
>
>
>


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