RE: pop3 errors
- From: Emiel Wieldraaijer <EmielWieldraaijer@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 2 May 2006 05:20:02 -0700
Event 1019 can be solved by adding ipaddress instead of dns name for
pop3server address
Event 1035 is related to it
We have seen these events caused by mismatched MTU's. In some cases, it can
be resolved by adjusting the MTU on the router used to connect to the
internet or in other cases, you can modify the MTU on the server. As a test,
try running the following command; you can replace the <pop
Server> name with the ones that you receive the events connecting to:
“ping -f -l 1472 <pop server>”
See if this pings or returns message "packet needs to be fragmented but DF
set". If it returns the second message, then adjust the 1472 value down (in
increments of 10 for instance) until you find the largest value that pings.
If you can ping through with 1472, then the MTU is not likely to be the
cause. However, you can still check the MTU value in the registry of the
server to see if it has been set to a value higher than 1500. If the MTU
value does not exist in the registry then the server defaults to the MTU for
media you are connecting with which is most likely 1500. If you receive a
request timed out, that server may not respond to pings.
Once you know the largest value that pings, you can manually set the MTU in
the registry of the server using the following steps:
1. Click Start, and then click Control Panel.
2. Double-click "Network and Internet Connections", and then click to open
the Network Connections folder.
3. If more than one network connection is listed for each connection
double-click the connection and then click the Support tab of the Status
interface that opens. The connection that shows a “Default Gateway” entry is
probably the network connection that is used to connect to the Internet. Note
the name of the connection (for example, "Local Area Connection 2").
4. Start Registry Editor (Regedit.exe).
5. Under the HKEY_LOCAL_MACHINE tree, go to the following key:
“SYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\”
6. Under that key are one or more keys that have numeric identifiers. Each
of these keys has a Connection subkey. Examine each of the keys that look
like this:
<ID_for_Adapter>\Connection Name value in the Connection subkey provides the
network connection name that is used in the Network Connections folder. When
you find the one that matches the name that you found in step 3, make a note
of the <ID_for_Adapter> that the network connection name is under.
7. Return to HKEY_LOCAL_MACHINE, and then locate the following key
“SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\<ID_for_Adapter>”
where <ID_for_Adapter> is the number that you noted in step 6. When you
highlight this key, several values appear on the right side of the screen,
including DefaultGateway and EnableDHCP.
8. Right-click the right side of the screen, click New, and then click DWORD
Value. Name the value MTU.
9. Double-click the value so that you can edit the value, change Base to
Decimal, and then enter the largest acceptable MTU size, which is the size
that you identified by using the Ping tests.
10. Quit Registry Editor.
If you need to do this on your router, please refer to it's documentation
for adjusting/setting the MTU".
"Warren Pierro" wrote:
I have a client set up with SBS 2003 running exchange with the POP3.
connector. I plan on contacting his email host to obtain the smart host
address later but for now he is using pop3.
I keep seeing errors in the event log, 1019, 1023 and 1035. When I click on
the link for details, microsoft dosen't have a solution.
The users are sending and recieving their email OK.
Anybody know how these can be resolved?
--
procompserv
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