Pop3 Collector trying to send to external addresses

Using SBS2000 with POP3 collection.
Each userâ??s external email user@ourdomain.com has a POP3 box at our ISP.
Each user has a mail store on exchange to which their mail is delivered.

All of a sudden incoming emails from external sources are behaving strangly.
If from hotmail I send a message to user@ourdomain.com and
someone@anotherdomain.com our server picks it up from the pop3 box, delivers
it to user@ourdomain, and also tries to then resend it externally to the
other recipient.

Tracking the message in Exchange shows:
"SMTP: Message Delivered Locally to multiple recipients"
"SMTP Store Driver: Message Delivered Locally to Store user@ourdomain"
"SMTP: Started Outbound Transfer of Message"
"SMTP: Non-Delivered Report (NDR) Generated"

In the details of the 1st line above it states the address of our user and
the external recipient, which it should just be ignoring! Then on the third
line its saying it wants to send it outbound â?? so realises its not a local
recipient. And then of course fails as the sender was external. It says the
sender is getting is getting an NDR but I havnâ??t actually seen one myself
from testing â?? it is sending me as admin a copy though.

Now nothing has changed on the server as far as I know. And the pop3 boxes
look ok. I know strange things happen if it collects a mail from pop3 and
there isn't a single recipient in the to/cc that matches a local user but
this isn't the scenario here.
The only other thing that might be interfering is Trend Scanmail but Iâ??ve
not changed the config of that for ages either.

Will be doing the good old reboot very shortly to see if that sorts it but I
canâ??t see why it would. Any one got any ideas?

Tony
Mon Dec 13 09:43:04 CST 2004

I did of course mean POP3 Connector as comes with SBS2000.
This:
http://www.microsoft.com/downloads/details.aspx?FamilyId=7B1FF109-092E-4418-AA37-A53AF7B8F6FC&displaylang=en
seems to be the same problem, a patch for SBS2003 though :| And I do not see
a reason why its suddenly broken itself if its related to this specific
problem.

"Tony" wrote:

> Using SBS2000 with POP3 collection.
> Each userâ??s external email user@ourdomain.com has a POP3 box at our ISP.
> Each user has a mail store on exchange to which their mail is delivered.
>
> All of a sudden incoming emails from external sources are behaving strangly.
> If from hotmail I send a message to user@ourdomain.com and
> someone@anotherdomain.com our server picks it up from the pop3 box, delivers
> it to user@ourdomain, and also tries to then resend it externally to the
> other recipient.
>
> Tracking the message in Exchange shows:
> "SMTP: Message Delivered Locally to multiple recipients"
> "SMTP Store Driver: Message Delivered Locally to Store user@ourdomain"
> "SMTP: Started Outbound Transfer of Message"
> "SMTP: Non-Delivered Report (NDR) Generated"
>
> In the details of the 1st line above it states the address of our user and
> the external recipient, which it should just be ignoring! Then on the third
> line its saying it wants to send it outbound â?? so realises its not a local
> recipient. And then of course fails as the sender was external. It says the
> sender is getting is getting an NDR but I havnâ??t actually seen one myself
> from testing â?? it is sending me as admin a copy though.
>
> Now nothing has changed on the server as far as I know. And the pop3 boxes
> look ok. I know strange things happen if it collects a mail from pop3 and
> there isn't a single recipient in the to/cc that matches a local user but
> this isn't the scenario here.
> The only other thing that might be interfering is Trend Scanmail but Iâ??ve
> not changed the config of that for ages either.
>
> Will be doing the good old reboot very shortly to see if that sorts it but I
> canâ??t see why it would. Any one got any ideas?
>

Tony
Tue Dec 14 02:33:04 CST 2004

Update: We have two POP3 boxes covering 2 domains on the ISP server, for
which our exchange server knows its responsible for.
The problems in my previous posts relate to our main domain, call it a.com
however sending a mail from an external source to b.com and another external
does not result in the problem. it's only when a.com is a recipient.

"Tony" wrote:

> I did of course mean POP3 Connector as comes with SBS2000.
> This:
> http://www.microsoft.com/downloads/details.aspx?FamilyId=7B1FF109-092E-4418-AA37-A53AF7B8F6FC&displaylang=en
> seems to be the same problem, a patch for SBS2003 though :| And I do not see
> a reason why its suddenly broken itself if its related to this specific
> problem.
>
> "Tony" wrote:
>
> > Using SBS2000 with POP3 collection.
> > Each userâ??s external email user@ourdomain.com has a POP3 box at our ISP.
> > Each user has a mail store on exchange to which their mail is delivered.
> >
> > All of a sudden incoming emails from external sources are behaving strangly.
> > If from hotmail I send a message to user@ourdomain.com and
> > someone@anotherdomain.com our server picks it up from the pop3 box, delivers
> > it to user@ourdomain, and also tries to then resend it externally to the
> > other recipient.
> >
> > Tracking the message in Exchange shows:
> > "SMTP: Message Delivered Locally to multiple recipients"
> > "SMTP Store Driver: Message Delivered Locally to Store user@ourdomain"
> > "SMTP: Started Outbound Transfer of Message"
> > "SMTP: Non-Delivered Report (NDR) Generated"
> >
> > In the details of the 1st line above it states the address of our user and
> > the external recipient, which it should just be ignoring! Then on the third
> > line its saying it wants to send it outbound â?? so realises its not a local
> > recipient. And then of course fails as the sender was external. It says the
> > sender is getting is getting an NDR but I havnâ??t actually seen one myself
> > from testing â?? it is sending me as admin a copy though.
> >
> > Now nothing has changed on the server as far as I know. And the pop3 boxes
> > look ok. I know strange things happen if it collects a mail from pop3 and
> > there isn't a single recipient in the to/cc that matches a local user but
> > this isn't the scenario here.
> > The only other thing that might be interfering is Trend Scanmail but Iâ??ve
> > not changed the config of that for ages either.
> >
> > Will be doing the good old reboot very shortly to see if that sorts it but I
> > canâ??t see why it would. Any one got any ideas?
> >