Re: How I spent my Christmas vacation - Email found in subject
- From: Danny <nocmonkey@xxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 3 Jan 2006 22:43:24 -0500
On 1/3/06, Ball, Dan <DBall@xxxxxxxxxxx> wrote:
> I don't have to send an e-mail to helpmeunderstandsmtp@xxxxxxxxxxxxx to
> tell you that the response will come from my server.
My point is that in this example, Microsoft does not accept email sent
to recipients that do not exist. End of SMTP conversation. Bye.
[...]
> I'm running a standards (RFC) compliant server.
Glad to hear.
> However, this is not the case in many of the e-mail we receive on a daily
> basis.
> Our server gets about 500-1000 e-mails a day that require an NDR being sent.
And they will continue to send to the wrong address until you stop
accepting email sent to recipients that do not exist. You must have a
lot of free time and resources to waste. You are contributing to the
problem by sending NDR's that the senders server should have sent to
begin with if you had configured your server to only accept email to
recipients that actually exist.
> Occasionally I go through these NDR e-mails to see what is being rejected.
Sorry, I don't have time to read other people's email, nor do most
people or companies.
> I keep hoping that everything that is sent out is a result of spam, but I keep
> finding valid NDRs in there.
You will continue to hope until you do as I recommend.
> If everything was as perfect as you imply, my server would never have to send
> out those messages!
Ask Microsoft why they only accept email sent to recipients that actually exist.
> I agree with you, free does not mean it is crap. Some of the biggest
> corporations use "free" software. The difference is that they regularly
> maintain/update it and keep it properly configured. This is not the
> case with a lot of the e-mail we receive. A lot of places we get e-mail
> from find an old RedHat or FirstMail CD from 10-15 years ago in a desk
> drawer, install it, and run it with it's outdated software and default
> settings. As long as it works, they don't care. We're not referring to
> the big-name e-mail servers like gmail.com, we're referring to the
> school with 100 kids and a volunteer parent that took one introductory
> college computer course setting up their e-mail server. There are TONS
> of programs out there beside postfix and sendmail. Heck, I even wrote
> one myself about ten years ago!
Fine, for all schools with 100 kids and a volunteer parent that took
one intro course on setting up an email server, accept email from
everyone to everyone from everyone and send NDR's to anyone. Now, for
the rest of the world, do as I say! :)
> Just to appease you, I did your "Google: email backspatter" search, but
> it only showed me exactly what I've been trying to describe to you.
Read this: http://spamlinks.net/prevent-secure-backscatter.htm
If you do not understand how such a configuration benefits the
Internet (unless you are a spammer) as a whole, then don't complain
when you get blacklisted for sending NDR's to spoofed addresses.
...D
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