Users can not receive external mail suddenly.

Users can not receive external mail suddenly.

We are running Exchange 2003 w/SP1 and all of a sudden our users can not 
receive external mail.  It had been working fine for years until this 
afternoon.  Internal mail flows fine.

External users all receive the following message:
The following recipient(s) could not be reached:
            There was a SMTP communication problem with the recipient's 
email server.  Please contact your system administrator.
            <(domain name) #5.5.0 smtp;553 sorry, that domain isn't in my 
list of allowed rcpthosts (#5.7.1)>

Here is the strange part.  Earlier in the day I attempted to restore one 
users mailbox with Veritas Backup Exec.  The user received a message in his 
mailbox saying that his mail was restored, but there wasn't anything there.

I don't think anyone has been able to receive external mail since.  I hope 
it's just a coincidence but my luck isn't that good.

I've tried restarting the machine, starting and stopping the virtual SMTP 
server and the Exchange store.
Nothing looks out of the ordinary on the server itself or in the event log.

Any help would be extremely appreciated...

date: Fri, 9 Jun 2006 16:06:02 -0700 author: ImagineSystems

Re: Users can not receive external mail suddenly.

Hi,

The message " #5.5.0 smtp;553 sorry, that domain isn't in my  list of 
allowed rcpthosts (#5.7.1)"
is not coming from the exchange server.

Do you have a smtp gateway in front of the server?
Is anything changed on this server?

Leif


"ImagineSystems"  wrote in message 
news:9AD1EDD2-FC22-4CA9-8C2E-2330AB551CCE@microsoft.com...
> We are running Exchange 2003 w/SP1 and all of a sudden our users can not
> receive external mail.  It had been working fine for years until this
> afternoon.  Internal mail flows fine.
>
> External users all receive the following message:
> The following recipient(s) could not be reached:
>            There was a SMTP communication problem with the recipient's
> email server.  Please contact your system administrator.
>            <(domain name) #5.5.0 smtp;553 sorry, that domain isn't in my
> list of allowed rcpthosts (#5.7.1)>
>
> Here is the strange part.  Earlier in the day I attempted to restore one
> users mailbox with Veritas Backup Exec.  The user received a message in 
> his
> mailbox saying that his mail was restored, but there wasn't anything 
> there.
>
> I don't think anyone has been able to receive external mail since.  I hope
> it's just a coincidence but my luck isn't that good.
>
> I've tried restarting the machine, starting and stopping the virtual SMTP
> server and the Exchange store.
> Nothing looks out of the ordinary on the server itself or in the event 
> log.
>
> Any help would be extremely appreciated...
>

date: Sat, 10 Jun 2006 14:24:47 +0200 author: Leif Pedersen [MVP]

Re: Users can not receive external mail suddenly.

Thanks for the response Leif.  
The only device in front of our Exchange server is a Netscreen firewall, and 
that looks to be OK.  
Everything I read seems to point to a DNS issue.  Is it possible there is an 
issue at the ISP and that it isn't internal to our network?  (XO 
Communications)

"Leif Pedersen [MVP]" wrote:

> Hi,
> 
> The message " #5.5.0 smtp;553 sorry, that domain isn't in my  list of 
> allowed rcpthosts (#5.7.1)"
> is not coming from the exchange server.
> 
> Do you have a smtp gateway in front of the server?
> Is anything changed on this server?
> 
> Leif
> 
> 
> "ImagineSystems"  wrote in message 
> news:9AD1EDD2-FC22-4CA9-8C2E-2330AB551CCE@microsoft.com...
> > We are running Exchange 2003 w/SP1 and all of a sudden our users can not
> > receive external mail.  It had been working fine for years until this
> > afternoon.  Internal mail flows fine.
> >
> > External users all receive the following message:
> > The following recipient(s) could not be reached:
> >            There was a SMTP communication problem with the recipient's
> > email server.  Please contact your system administrator.
> >            <(domain name) #5.5.0 smtp;553 sorry, that domain isn't in my
> > list of allowed rcpthosts (#5.7.1)>
> >
> > Here is the strange part.  Earlier in the day I attempted to restore one
> > users mailbox with Veritas Backup Exec.  The user received a message in 
> > his
> > mailbox saying that his mail was restored, but there wasn't anything 
> > there.
> >
> > I don't think anyone has been able to receive external mail since.  I hope
> > it's just a coincidence but my luck isn't that good.
> >
> > I've tried restarting the machine, starting and stopping the virtual SMTP
> > server and the Exchange store.
> > Nothing looks out of the ordinary on the server itself or in the event 
> > log.
> >
> > Any help would be extremely appreciated...
> > 
> 
> 
>

date: Sat, 10 Jun 2006 06:06:01 -0700 author: ImagineSystems

Re: Users can not receive external mail suddenly.

Hi,

It is possible, but if we look at the ndr the mails are received/rejected 
somewhere so this would mean that your MX record is pointing to a wrong IP 
address.

If you post your domain name we could try to see if the DNS is configured 
properly.

Leif

"ImagineSystems"  wrote in message 
news:19EC2AD5-0D6F-4721-A5EA-543D394F7C67@microsoft.com...
> Thanks for the response Leif.
> The only device in front of our Exchange server is a Netscreen firewall, 
> and
> that looks to be OK.
> Everything I read seems to point to a DNS issue.  Is it possible there is 
> an
> issue at the ISP and that it isn't internal to our network?  (XO
> Communications)
>
> "Leif Pedersen [MVP]" wrote:
>
>> Hi,
>>
>> The message " #5.5.0 smtp;553 sorry, that domain isn't in my  list of
>> allowed rcpthosts (#5.7.1)"
>> is not coming from the exchange server.
>>
>> Do you have a smtp gateway in front of the server?
>> Is anything changed on this server?
>>
>> Leif
>>
>>
>> "ImagineSystems"  wrote in 
>> message
>> news:9AD1EDD2-FC22-4CA9-8C2E-2330AB551CCE@microsoft.com...
>> > We are running Exchange 2003 w/SP1 and all of a sudden our users can 
>> > not
>> > receive external mail.  It had been working fine for years until this
>> > afternoon.  Internal mail flows fine.
>> >
>> > External users all receive the following message:
>> > The following recipient(s) could not be reached:
>> >            There was a SMTP communication problem with the recipient's
>> > email server.  Please contact your system administrator.
>> >            <(domain name) #5.5.0 smtp;553 sorry, that domain isn't in 
>> > my
>> > list of allowed rcpthosts (#5.7.1)>
>> >
>> > Here is the strange part.  Earlier in the day I attempted to restore 
>> > one
>> > users mailbox with Veritas Backup Exec.  The user received a message in
>> > his
>> > mailbox saying that his mail was restored, but there wasn't anything
>> > there.
>> >
>> > I don't think anyone has been able to receive external mail since.  I 
>> > hope
>> > it's just a coincidence but my luck isn't that good.
>> >
>> > I've tried restarting the machine, starting and stopping the virtual 
>> > SMTP
>> > server and the Exchange store.
>> > Nothing looks out of the ordinary on the server itself or in the event
>> > log.
>> >
>> > Any help would be extremely appreciated...
>> >
>>
>>
>>

date: Sat, 10 Jun 2006 15:31:55 +0200 author: Leif Pedersen [MVP]

Re: Users can not receive external mail suddenly.

Thanks for the info.  The issue seemed to resolve itself overnight, so maybe 
it was an issue with the MX record being directed to the wrong IP 
temporarily.  Let's see if everything is working Monday morning.
Thanks for the help.

"Leif Pedersen [MVP]" wrote:

> Hi,
> 
> It is possible, but if we look at the ndr the mails are received/rejected 
> somewhere so this would mean that your MX record is pointing to a wrong IP 
> address.
> 
> If you post your domain name we could try to see if the DNS is configured 
> properly.
> 
> Leif
> 
> "ImagineSystems"  wrote in message 
> news:19EC2AD5-0D6F-4721-A5EA-543D394F7C67@microsoft.com...
> > Thanks for the response Leif.
> > The only device in front of our Exchange server is a Netscreen firewall, 
> > and
> > that looks to be OK.
> > Everything I read seems to point to a DNS issue.  Is it possible there is 
> > an
> > issue at the ISP and that it isn't internal to our network?  (XO
> > Communications)
> >
> > "Leif Pedersen [MVP]" wrote:
> >
> >> Hi,
> >>
> >> The message " #5.5.0 smtp;553 sorry, that domain isn't in my  list of
> >> allowed rcpthosts (#5.7.1)"
> >> is not coming from the exchange server.
> >>
> >> Do you have a smtp gateway in front of the server?
> >> Is anything changed on this server?
> >>
> >> Leif
> >>
> >>
> >> "ImagineSystems"  wrote in 
> >> message
> >> news:9AD1EDD2-FC22-4CA9-8C2E-2330AB551CCE@microsoft.com...
> >> > We are running Exchange 2003 w/SP1 and all of a sudden our users can 
> >> > not
> >> > receive external mail.  It had been working fine for years until this
> >> > afternoon.  Internal mail flows fine.
> >> >
> >> > External users all receive the following message:
> >> > The following recipient(s) could not be reached:
> >> >            There was a SMTP communication problem with the recipient's
> >> > email server.  Please contact your system administrator.
> >> >            <(domain name) #5.5.0 smtp;553 sorry, that domain isn't in 
> >> > my
> >> > list of allowed rcpthosts (#5.7.1)>
> >> >
> >> > Here is the strange part.  Earlier in the day I attempted to restore 
> >> > one
> >> > users mailbox with Veritas Backup Exec.  The user received a message in
> >> > his
> >> > mailbox saying that his mail was restored, but there wasn't anything
> >> > there.
> >> >
> >> > I don't think anyone has been able to receive external mail since.  I 
> >> > hope
> >> > it's just a coincidence but my luck isn't that good.
> >> >
> >> > I've tried restarting the machine, starting and stopping the virtual 
> >> > SMTP
> >> > server and the Exchange store.
> >> > Nothing looks out of the ordinary on the server itself or in the event
> >> > log.
> >> >
> >> > Any help would be extremely appreciated...
> >> >
> >>
> >>
> >> 
> 
> 
>

date: Sun, 11 Jun 2006 05:38:01 -0700 author: ImagineSystems