Victor Duchovni wrote:
> On Fri, Apr 29, 2011 at 09:39:10AM -0400, Wietse Venema wrote:
>
>>> This looks like a Null MX record:
>>> http://tools.ietf.org/html/draft-delany-nullmx-00
>>>
>>> If the domain owner declares that this domain never sends or recieves
>>> email, then shouldn't postfix reje
ostfix was built by looking at official email standards. Then, I
> added hacks and workarounds for systems that don't play by the
> rules.
>
>> Apr 29 14:58:09 mx postfix/smtpd[4880]: NOQUEUE: reject: RCPT from
>> xxx.yyy.zzz[xxx.yyy.zzz.xxx]: 450 4.1.8 : Sender
>> add
Victor Duchovni:
> On Fri, Apr 29, 2011 at 09:39:10AM -0400, Wietse Venema wrote:
>
> > > This looks like a Null MX record:
> > > http://tools.ietf.org/html/draft-delany-nullmx-00
> > >
> > > If the domain owner declares that this domain never sends or recieves
> > > email, then shouldn't postfix
On Fri, Apr 29, 2011 at 09:39:10AM -0400, Wietse Venema wrote:
> > This looks like a Null MX record:
> > http://tools.ietf.org/html/draft-delany-nullmx-00
> >
> > If the domain owner declares that this domain never sends or recieves
> > email, then shouldn't postfix reject the above message with
e
> in resource data of MX record for somedomain.com:
> Apr 29 14:58:09 mx postfix/smtpd[4880]: NOQUEUE: reject: RCPT from
> xxx.yyy.zzz[xxx.yyy.zzz.xxx]: 450 4.1.8 : Sender
> address rejected: Malformed DNS server reply; from=
> to= proto=ESMTP helo=
> Apr 29 14:58:09 mx pos
rkarounds for systems that don't play by the
rules.
> Apr 29 14:58:09 mx postfix/smtpd[4880]: NOQUEUE: reject: RCPT from
> xxx.yyy.zzz[xxx.yyy.zzz.xxx]: 450 4.1.8 : Sender
> address rejected: Malformed DNS server reply; from=
> to= proto=ESMTP helo=
> Apr 29 14:58:09 mx postfix
for somedomain.com:
Apr 29 14:58:09 mx postfix/smtpd[4880]: NOQUEUE: reject: RCPT from
xxx.yyy.zzz[xxx.yyy.zzz.xxx]: 450 4.1.8 : Sender
address rejected: Malformed DNS server reply; from=
to= proto=ESMTP helo=
Apr 29 14:58:09 mx postfix/smtpd[4880]: disconnect from
fxxx.yyy.zzz[xxx.yyy.zzz.xxx]
And
Jim Wright:
> On Aug 28, 2009, at 5:50 PM, Noel Jones wrote:
>
> > Mail from yahoo.com is now rejected with:
> >
> > Aug 28 16:24:05 mgate2 postfix/smtpd[53002]: NOQUEUE: reject: RCPT
> > from web34202.mail.mud.yahoo.com[66.163.178.117]: 554 5.7.1
> > :
On Aug 28, 2009, at 5:50 PM, Noel Jones wrote:
Mail from yahoo.com is now rejected with:
Aug 28 16:24:05 mgate2 postfix/smtpd[53002]: NOQUEUE: reject: RCPT
from web34202.mail.mud.yahoo.com[66.163.178.117]: 554 5.7.1
: Helo command rejected: Malformed DNS
server reply; from= to= proto
rom yahoo.com is now rejected with:
Aug 28 16:24:05 mgate2 postfix/smtpd[53002]: NOQUEUE: reject:
RCPT from web34202.mail.mud.yahoo.com[66.163.178.117]: 554
5.7.1 : Helo command rejected:
Malformed DNS server reply; from=
to= proto=SMTP helo=
If we look up the helo name, we see:
# host web3420
4.133.216.50]: 450 4.1.8 <[EMAIL PROTECTED]>: Sender address
> rejected: Malformed DNS server reply; from=<[EMAIL PROTECTED]> to=<[EMAIL
> PROTECTED]> proto=ESMTP helo=
>
Postfix also logs a warning.
> I decided to do some digging into their DNS, and found an o
TED]>: Sender address
rejected: Malformed DNS server reply; from=<[EMAIL PROTECTED]> to=<[EMAIL
PROTECTED]> proto=ESMTP helo=
I decided to do some digging into their DNS, and found an odd-looking MX
record:
$ dig fuelly.com mx +short
5 .
I've never seen the root used as a mail e
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