POP3 application can't delete messages from exchange server

[dave]

Hi there,

I am hoping someone can help me with this, I am fairly new to exchange and
have a problem I can't seem to solve. We have an application which connects
to our ISP's mail server to download messages, sends them to a biztalk
application then deletes them off the mail server. This is currently working
100 percent but we want to shift it to our exchange 2003 server and lose the
ISP mailboxes.
The problem is that as soon as we point it to exchange it downloads the
messages but will not delete them, then next time it poll's the mailbox it
downloads the same messages again. I can telnet into the exchange server and
by using the dele command they delete as expected. We had a look at the code
of this application (the guy who wrote it has left) and all appears ok, the
dele and quit commands are in the right place and when we step through it,
it appears to issue them correctly. Does anybody have any ideas why our
application will not work correctly with exchange server while working on
our ISP's mail server?

Thanks in advance
Dave

[Lanwench [MVP - Exchange]]

dave wrote:

Hi there,

I am hoping someone can help me with this, I am fairly new to
exchange and have a problem I can't seem to solve. We have an
application which connects to our ISP's mail server to download
messages, sends them to a biztalk application then deletes them off
the mail server. This is currently working 100 percent but we want to
shift it to our exchange 2003 server and lose the ISP mailboxes.
The problem is that as soon as we point it to exchange it downloads
the messages but will not delete them, then next time it poll's the
mailbox it downloads the same messages again. I can telnet into the
exchange server and by using the dele command they delete as
expected. We had a look at the code of this application (the guy who
wrote it has left) and all appears ok, the dele and quit commands are
in the right place and when we step through it, it appears to issue
them correctly. Does anybody have any ideas why our application will
not work correctly with exchange server while working on our ISP's
mail server?

Thanks in advance
Dave

How is the application connecting? POP3? This is never controlled by the
server - only by the client, although if there is any loss of connectivity,
the messages won't be marked for removal on the server & you might see this
behavior. If you connect to a test mailbox on your Exchange server using
Outlook Express or some other POP client, can you reproduce the problem?

[Stefan Engelbert]

Probably the pop3 connector you are using is not 100% up to RFC Standard.
You might contact the vendor to fix it or use a different connector. I could
even
suggest you a good pop3 sdk so you script it yourself.
Thanks
Frank

"dave" <bryn@nospam.bryn.com.au> wrote in message
news:Oq3DDjS$EHA.2568@TK2MSFTNGP10.phx.gbl...

Hi there,

I am hoping someone can help me with this, I am fairly new to exchange and
have a problem I can't seem to solve. We have an application which
connects to our ISP's mail server to download messages, sends them to a
biztalk application then deletes them off the mail server. This is
currently working 100 percent but we want to shift it to our exchange 2003
server and lose the ISP mailboxes.
The problem is that as soon as we point it to exchange it downloads the
messages but will not delete them, then next time it poll's the mailbox it
downloads the same messages again. I can telnet into the exchange server
and by using the dele command they delete as expected. We had a look at
the code of this application (the guy who wrote it has left) and all
appears ok, the dele and quit commands are in the right place and when we
step through it, it appears to issue them correctly. Does anybody have any
ideas why our application will not work correctly with exchange server
while working on our ISP's mail server?

Thanks in advance
Dave

[dave]

Yes it connects using POP3, we set up a test account on the exchange box and
when using the application it leaves the messages on the server, however
when using an outlook client, outlook express or telnetting, it works
correctly (can't reproduce the problem). It must be something to do with the
code in our application, I will get one of our developers to look into and
hopefully they can rewrite the section of code dealing with the mail
retrieval. Initially I thought the code must be ok because it is working
correctly with other POP3 servers (eg our ISP's). thanks for your reply.

"Lanwench [MVP - Exchange]"
<lanwench@heybuddy.donotsendme.unsolicitedmail.aty ahoo.com> wrote in message
news:eWpAA3V$EHA.3908@TK2MSFTNGP12.phx.gbl...

dave wrote:
Hi there,

I am hoping someone can help me with this, I am fairly new to
exchange and have a problem I can't seem to solve. We have an
application which connects to our ISP's mail server to download
messages, sends them to a biztalk application then deletes them off
the mail server. This is currently working 100 percent but we want to
shift it to our exchange 2003 server and lose the ISP mailboxes.
The problem is that as soon as we point it to exchange it downloads
the messages but will not delete them, then next time it poll's the
mailbox it downloads the same messages again. I can telnet into the
exchange server and by using the dele command they delete as
expected. We had a look at the code of this application (the guy who
wrote it has left) and all appears ok, the dele and quit commands are
in the right place and when we step through it, it appears to issue
them correctly. Does anybody have any ideas why our application will
not work correctly with exchange server while working on our ISP's
mail server?

Thanks in advance
Dave

How is the application connecting? POP3? This is never controlled by the
server - only by the client, although if there is any loss of
connectivity,
the messages won't be marked for removal on the server & you might see
this
behavior. If you connect to a test mailbox on your Exchange server using
Outlook Express or some other POP client, can you reproduce the problem?