POP3 Connector Mail Download limit


If you have SBS and are getting the following errors.

Source: Windows Small Business Server 2008
Event ID: 210
Task Category: Windows SBS POP3 Connector
Description:
One or more messages (1) were left in the “” account on the POP3 server
“” because they are larger than the maximum acceptable
message size

You can increase the message size limit but I would strongly suggest you make sure you have the horsepower to do this or you WILL have performance issues trying to transfer large mail.

That being said, from the Exchange Powershell run the following

This command will display the current size

Get-ReceiveConnector | select identity, maxmessagesize

This will set the size to 50mb and the timout to 9 min.

Get-ReceiveConnector | Set-ReceiveConnector -MaxMessageSize 50mb -ConnectionInactivityTimeout 00:09:00

Then restart transport…

This will set all receive to 50 mb, use with caution!

4 thoughts on “POP3 Connector Mail Download limit

  1. SBS2008 w/ Exchange 2007. I set the Transportconfig, and all receive connectors to 50MB for both send/receive.
    I tested Outlook 2007 and OWA and they worked, but Apple Mail client still limited to the 10MB size limit. Is there anything special that needs to be done to support Apple Mail clients?

    • I dont know of a limitatation on Apple mail client but as far as beeing able to “recieve” large messsages my article should take care of it regardless of client…

      However if you are trying to set send limits; that need to be set on the send connectors and global server setting.
      msexchange.org has a good article on that

      But basicaly if you wanted to set the send limit to 50 on everything you would do this.
      Get-SendConnector | Set-SendConnector -MaxMessageSize 50mb
      Set-Transportconfig –maxsendsize 50mb

      Dont know if this is your issue but a quick google search seems to indicate a possible issue with the client.

      Does it work with entourage?

  2. In my case, I had changed every receive connector manually EXCEPT the SBS Fax SharePoint Receive connector, it was still set at 10 MB. Once I changed that one, the large mails started coming in. Thanks for sending me in the right direction!

  3. Great, Scott! Indeed, the Windows SBS Fax Sharepoint Receive $SERVER_NAME connector is the troublesome one. The reason appears to be that POP3 connector communicates on 127.0.0.1 (per the tracking log) and that connector is specifically set to 127.0.0.1 and only 127.0.0.1! (It is the only connector with 127.0.0.1 as its local (bind) address.)

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