POP3 Connector doesn't work by schedule?!

Discussion in 'Windows Small Business Server' started by Richard P, Nov 2, 2004.

  1. Richard P

    Richard P Guest

    Hi there I have an SBS 2003 server with all the latest Service Packs
    Installed, been working fine for weeks, all of a sudden it won't retrieve
    email on it's own (set to every 15 mins) but WILL when you manually tell it
    to download email.

    The error in the event log is:

    Event Type: Error
    Event Source: POP3 Connector
    Event Category: Download
    Event ID: 1035
    Date: 02/11/2004
    Time: 19:45:15
    User: N/A
    Computer: *******
    A error occurred in connecting to the <my ISP> POP3 server for user <my
    company>. The error is 11004. The server may be down for maintenance or your
    server is not connected to the Internet.

    For more information, see Help and Support Center at

    My server IS connected to the internet....could this be a recent ISP

    many thanks in anticipation
    Richard Pask
    Richard P, Nov 2, 2004
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  2. Do you have more than one pop3 mailbox defined in the pop3 connector?
    If yes, do you see the event ID 1035 for different users or is always on
    the same one?

    Is your SBS 2003 server connected directly to the internet or is there a
    router/firewall in between?
    If there is a router/firewall in between, what is the make and model of it?

    We have seen similar instances of this resolved by adjusting the MTU on
    external hardware router/firewalls that the sbs server must pass through to
    access the internet.

    Chris Puckett, MCSE
    Microsoft Small Business Server Support

    This posting is provided "AS IS" with no warranties, and confers no rights.
    Chris Puckett [MSFT], Nov 2, 2004
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  3. Richard P

    Richard P Guest

    Hi Chris

    There is only 1 POP3 mailbox defined.

    a 3com 3CRWE754G72-A wireless firewall / router and combined ADSL modem is
    used to connect to the internet (server has two nics). The wireless part is
    of course turned off ! We purchased several of these routers and it was cost
    effective to use it without the wireless part being enabled.

    I'm afraid my knowledge ends when you talk about MTU ? However I beleive I
    have seen a firmware upgrade for this device that talks about fixing an "MTU
    bug" ???

    many thanks for your reply, look forward to hearing from you soon.

    Richard P, Nov 3, 2004
  4. MTU stands for Maximum Transmission Unit. It defines the largest packet
    that a network device can handle before it breaks it up into smaller

    We have seen the event and symptoms you report with a Linksys router and
    applying a firmware update (which included a fix for an MTU bug) to it
    resolved the issue. I would suggest trying the firmware update for your 3
    com router.

    If you wanted to be sure it was your 3com router, you could briefly connect
    your server directly to the ADSL modem and wait for the pop3 schedule to

    Chris Puckett, MCSE
    Microsoft Small Business Server Support

    This posting is provided "AS IS" with no warranties, and confers no rights.
    Chris Puckett [MSFT], Nov 3, 2004
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