bouncing email

I have an email account with my ISP, Demon. I use this to send email to a
small mailing list - about 50 people.

Mail to one recipient bounces, the NDR says: "550 instead of a domain name
on the right hand side."

If I send one email explicitly to the same recipient that also bounces, but
with " 503 Valid RCPT command must precede DATA"

Google suggests that this is a problem with my mail server (i.e. Demon) in
that I should authenticate SMTP before sending. However my internet
connection is with Demon, and their documentation suggests that
authentication is provided by virtue of the internet connection - and
further, if failure to authenticate with the Demon SMTP server were the
problem why does it work for the other 49 recipients on my mailing list?

Can anybody please suggest the real cause of this problem?

TIA

-- Graham

Graham J wrote:
> I have an email account with my ISP, Demon. I use this to send email to a
> small mailing list - about 50 people.
>
> Mail to one recipient bounces, the NDR says: "550 instead of a domain name
> on the right hand side."
>
> If I send one email explicitly to the same recipient that also bounces, but
> with " 503 Valid RCPT command must precede DATA"
>
> Google suggests that this is a problem with my mail server (i.e. Demon) in
> that I should authenticate SMTP before sending. However my internet
> connection is with Demon, and their documentation suggests that
> authentication is provided by virtue of the internet connection - and
> further, if failure to authenticate with the Demon SMTP server were the
> problem why does it work for the other 49 recipients on my mailing list?
>
> Can anybody please suggest the real cause of this problem?
>

It sounds like the mail address is badly formed. Or missing.

Check for inverted commas in it.



> TIA
>
> -- Graham
>
>

"The Natural Philosopher" <(E-Mail Removed)> wrote in message
news:gurco9$lut$(E-Mail Removed)...
> Graham J wrote:
>> I have an email account with my ISP, Demon. I use this to send email to
>> a small mailing list - about 50 people.
>>
>> Mail to one recipient bounces, the NDR says: "550 instead of a domain
>> name on the right hand side."
>>
>> If I send one email explicitly to the same recipient that also bounces,
>> but with " 503 Valid RCPT command must precede DATA"
>>
>> Google suggests that this is a problem with my mail server (i.e. Demon)
>> in that I should authenticate SMTP before sending. However my internet
>> connection is with Demon, and their documentation suggests that
>> authentication is provided by virtue of the internet connection - and
>> further, if failure to authenticate with the Demon SMTP server were the
>> problem why does it work for the other 49 recipients on my mailing list?
>>
>> Can anybody please suggest the real cause of this problem?
>>
>
> It sounds like the mail address is badly formed. Or missing.
>
> Check for inverted commas in it.

No, don't think so.

Could you try to send to it please, it is: (E-Mail Removed)

--
Graham J

"Plusnet Support Team" <(E-Mail Removed)> wrote in message
news:B7SdnXhyY-O-(E-Mail Removed)...
>
> Graham J wrote:
>> I have an email account with my ISP, Demon. I use this to send email to
>> a small mailing list - about 50 people.
>>
>> Mail to one recipient bounces, the NDR says: "550 instead of a domain
>> name on the right hand side."
>>
>> If I send one email explicitly to the same recipient that also bounces,
>> but with " 503 Valid RCPT command must precede DATA"
>>
>> Google suggests that this is a problem with my mail server (i.e. Demon)
>> in that I should authenticate SMTP before sending. However my internet
>> connection is with Demon, and their documentation suggests that
>> authentication is provided by virtue of the internet connection - and
>> further, if failure to authenticate with the Demon SMTP server were the
>> problem why does it work for the other 49 recipients on my mailing list?
>>
>> Can anybody please suggest the real cause of this problem?
>
> Are you sending *from* a valid email address?

Yes. All other emails sent via this account all get through OK

--
Graham J

It's customary to mung email addresses on Usenet.
--
Graham.

%Profound_observation%

"Graham." <(E-Mail Removed)> wrote in message
news:gusfn1$pbf$(E-Mail Removed)...
>
> It's customary to mung email addresses on Usenet.
> Graham.
>
>
Indeed, a popular munge is to replace @ for AT,
or replace any numbers for the written word

Munges are used to confuse Spambots

It's for the replier to interpret the email addy in the header for munges
and correct them

use a bit of common sense

Steve Terry

"Alex Fraser" <(E-Mail Removed)> wrote in message
news:0b-(E-Mail Removed)...
> Graham J wrote:
>> I have an email account with my ISP, Demon. I use this to send email to
>> a small mailing list - about 50 people.
>>
>> Mail to one recipient bounces, the NDR says: "550 instead of a domain
>> name on the right hand side."
>
> This appears to be only the last line of a multi-line error response that
> was returned in response to a RCPT command. From Google I reckon the full
> response should read, "It appears that the DNS operator for $DOMAIN has
> installed an invalid MX record with an IP address instead of a domain name
> on the right hand side."
>
> On checking the domain given in another post, this is an accurate
> diagnosis. So, whoever is responsible for maintaining DNS for the domain
> should replace the MX record with one that specifies the *name* of the
> server responsible for handling mail for the domain.
>
>> If I send one email explicitly to the same recipient that also bounces,
>> but with " 503 Valid RCPT command must precede DATA"
>
> There's something broken... The error is reasonable, but the error I would
> expect to be reported is the one above. Google RFC2920 if you're
> interested.

Just to be completely clear about this: it is me that receives the NDR.

Is it MY domain that is incorrectly configured, or the domain that I tried
to send the original message to?

--
Graham J

Graham. <(E-Mail Removed)> wrote:
> It's customary to mung email addresses on Usenet.

You might think it's customary; I don't. In fact, I don't think I've
ever munged my address, and I've been posting in one form or another
since the late '80s. I see the subject line of maybe one or two pieces
of spam a week in my email (my spam filters do see much, much, more).

Chris

Graham J wrote:
> "Alex Fraser" <(E-Mail Removed)> wrote in message
> news:0b-(E-Mail Removed)...
>> Graham J wrote:
>>> I have an email account with my ISP, Demon. I use this to send email to
>>> a small mailing list - about 50 people.
>>>
>>> Mail to one recipient bounces, the NDR says: "550 instead of a domain
>>> name on the right hand side."
>> This appears to be only the last line of a multi-line error response that
>> was returned in response to a RCPT command. From Google I reckon the full
>> response should read, "It appears that the DNS operator for $DOMAIN has
>> installed an invalid MX record with an IP address instead of a domain name
>> on the right hand side."
>>
>> On checking the domain given in another post, this is an accurate
>> diagnosis. So, whoever is responsible for maintaining DNS for the domain
>> should replace the MX record with one that specifies the *name* of the
>> server responsible for handling mail for the domain.
>>
>>> If I send one email explicitly to the same recipient that also bounces,
>>> but with " 503 Valid RCPT command must precede DATA"
>> There's something broken... The error is reasonable, but the error I would
>> expect to be reported is the one above. Google RFC2920 if you're
>> interested.
>
> Just to be completely clear about this: it is me that receives the NDR.
>
> Is it MY domain that is incorrectly configured, or the domain that I tried
> to send the original message to?
>
The latter. I think he has pinned it.

On Tue, 19 May 2009 20:02:34 UTC, "Ato_Zee" <(E-Mail Removed)> wrote:

>
> On 19-May-2009, Alex Fraser <(E-Mail Removed)> wrote:
>
> > > Just to be completely clear about this: it is me that receives the NDR.
> > >
> > > Is it MY domain that is incorrectly configured, or the domain that I
> > > tried
> > > to send the original message to?
>
> There are a number of email address verifiers, either web
> based, such as
> http://verify-email.org/
> or stand alone utilities that you install on your PC to
> check bulk lists of email addresses (as used by spammers
> to check that the list they bought are vaild addresses).
> Or you can talk to the remote email server and ask if
> it can accept mail for a given recipient, using the HELO
> command.

You need to go rather further than the HELO command, which is just the
opening shot in the protocol. And there's no guarantee even if you get a
RCPT command accepted - it might be an outward facing mail server that
accepts anything.

--
Bob Eager
Use the BIG mirror service in the UK:
http://www.mirrorservice.org