Hi,

I operate my own mail server over DSL, and recently, have found my IP banned
by some services, purportedly because my server does not have reverse DNS
lookup.

The server is running Windows 2003 Server in standalone mode (no active
directlry), but I do have the DNS server installed. Any instructions on how
I can remedy this situation? Thanks.

Joe

"Joe Befumo" <jpb@nospam.befumo.com> wrote in message
news:12qf9mur008nh8c@corp.supernews.com...
> Hi,
>
> I operate my own mail server over DSL, and recently, have found my IP
> banned
> by some services, purportedly because my server does not have reverse DNS
> lookup.
>
> The server is running Windows 2003 Server in standalone mode (no active
> directlry), but I do have the DNS server installed. Any instructions on
> how
> I can remedy this situation? Thanks.

DNS server on YOUR computer is UNIMPORTANT.

In some real sense the reverse zones belong to the ISP and they set
most all of the PTR records.

The ISP must have a reverse zone and entry for your address if
you wish all SMTP servers to receive your emails.

Your SMTP server needs to be configured with the SAME NAME;
the name doesn't have to be what YOU call your server, but if they
are different names (reverse=smtp, but different from servers normal
name) then you should also add another A record (perhaps at the
ISP again that matches.)


--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com
(phone on web site)

I see, I think. I'll talk to my ISP. Thanks.

Joe

"Herb Martin" <news@learnquick.com> wrote in message
news:eJXgSgnNHHA.4848@TK2MSFTNGP04.phx.gbl...
>
> "Joe Befumo" <jpb@nospam.befumo.com> wrote in message
> news:12qf9mur008nh8c@corp.supernews.com...
> > Hi,
> >
> > I operate my own mail server over DSL, and recently, have found my IP
> > banned
> > by some services, purportedly because my server does not have reverse
DNS
> > lookup.
> >
> > The server is running Windows 2003 Server in standalone mode (no active
> > directlry), but I do have the DNS server installed. Any instructions on
> > how
> > I can remedy this situation? Thanks.
>
> DNS server on YOUR computer is UNIMPORTANT.
>
> In some real sense the reverse zones belong to the ISP and they set
> most all of the PTR records.
>
> The ISP must have a reverse zone and entry for your address if
> you wish all SMTP servers to receive your emails.
>
> Your SMTP server needs to be configured with the SAME NAME;
> the name doesn't have to be what YOU call your server, but if they
> are different names (reverse=smtp, but different from servers normal
> name) then you should also add another A record (perhaps at the
> ISP again that matches.)
>
>
> --
> Herb Martin, MCSE, MVP
> http://www.LearnQuick.Com
> (phone on web site)
>
>

"Joe Befumo" <jpb@nospam.befumo.com> wrote in message
news:12qfo303h0mlr7e@corp.supernews.com...
>I see, I think. I'll talk to my ISP. Thanks.

Many ISPs already have "generic reverse records" with
names like DSL-001.isp.com.

SOME people will distrust such names that are (likely to
be) dynamically assigned addresses.

Also, you will have (some) trouble if your address is actually
dynamic, since you will (continually) need to keep changing the
SMTP servers reported (HELO) name.

BTW, I didn't emphasize this the first time, but when setting
your SMTP server the name or location of this configuration
is dependent on the actual SMTP software but is usually called
something like "SMTP Server name" or "HELO Name" because
this is the name your SMTP server reports when it announces
itself with HELO to another SMTP server.

--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com
(phone on web site)

Read inline,
In news:%23cHZ2GrNHHA.2140@TK2MSFTNGP03.phx.gbl,
Herb Martin <news@learnquick.com> typed:
> "Joe Befumo" <jpb@nospam.befumo.com> wrote in message
> news:12qfo303h0mlr7e@corp.supernews.com...
>> I see, I think. I'll talk to my ISP. Thanks.
>
> Many ISPs already have "generic reverse records" with
> names like DSL-001.isp.com.
>
> SOME people will distrust such names that are (likely to
> be) dynamically assigned addresses.
>
> Also, you will have (some) trouble if your address is actually
> dynamic, since you will (continually) need to keep changing the
> SMTP servers reported (HELO) name.
>
> BTW, I didn't emphasize this the first time, but when setting
> your SMTP server the name or location of this configuration
> is dependent on the actual SMTP software but is usually called
> something like "SMTP Server name" or "HELO Name" because
> this is the name your SMTP server reports when it announces
> itself with HELO to another SMTP server.

Not to mention, if you have a dynamic IP address, many ISP's now block
outgoing SMTP ports to all other IP address except for their own SMTP
server's address. This has resulted in a huge reduction in the mass mailer
type of e-mail threats, since most of these are sent directly from infected
client computers.

--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This s
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"Kevin D. Goodknecht Sr. [MVP]" <admin@nospam.WFTX.US> wrote in message
news:OqwvE6rNHHA.4244@TK2MSFTNGP04.phx.gbl...
>
> Not to mention, if you have a dynamic IP address, many ISP's now block
> outgoing SMTP ports to all other IP address except for their own SMTP
> server's address. This has resulted in a huge reduction in the mass mailer
> type of e-mail threats, since most of these are sent directly from
> infected
> client computers.

And IF done properly actually eliminates most of the concern/need
for the reverse records for your own SMTP server.

You send to the ISP, their server is (hopefully) correctly configured,
and it sends to the actual recipient SMTP server.

The disadvantage is that you don't get direct control and might sometimes
have to argue with your own ISP about what constitutes a "reasonable"
number of messages daily, but in exchange you don't have your ISP likely
to get added to blacklists (along with your 'innocent' SMTP server) due
to other customers on the ISPs network.


--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com
(phone on web site)