Hi,I just setup an new SBS 2008 server with exchange 2008 SP 2.I just can't use POP3 connector because of timeout errors; seams to be the same problem as http://social.technet.microsoft.com/Forums/en/exchangesvradmin/thread/8db9fc6b-6ac1-4742-a291-d69abcc703b2Here are is part of my pop3service.log file :[t 0] 02/05/10, 23:58:52: "Retrieve Now" finished.[t 0] 02/06/10, 00:06:31: Beginning "Retrieve Now"...[t 0] 02/06/10, 00:06:31: (AsyncConn[ pop.ameos.com:110 ]) Connecting to 'pop.ameos.com' on port 110.[t 0] 02/06/10, 00:06:31: (POP3) [RX] +OK POP3 dns1.ameos.com v2003.83 server ready[t 0] 02/06/10, 00:06:31: (POP3) [TX] USER mail-domain-com-mathieu[t 0] 02/06/10, 00:06:31: (POP3) [RX] +OK User name accepted, password please[t 0] 02/06/10, 00:06:31: (POP3) [TX] PASS ************************[t 0] 02/06/10, 00:06:31: (POP3) [RX] +OK Mailbox open, 6 messages[t 0] 02/06/10, 00:06:31: (POP3) [TX] STAT[t 0] 02/06/10, 00:06:31: (POP3) [RX] +OK 6 55931[t 0] 02/06/10, 00:06:31: Check for new messages: 6 (54,6 Ko) total.[t 0] 02/06/10, 00:06:31: (AsyncConn[ localhost:25 ]) Connecting to 'localhost' on port 25.[t 0] 02/06/10, 00:06:31: (SMTP) [RX] 220 SERVEUR.mail-domain.local Microsoft ESMTP MAIL Service ready at Sat, 6 Feb 2010 00:06:30 +0100[t 0] 02/06/10, 00:06:31: (SMTP) [TX] EHLO SERVEUR[t 0] 02/06/10, 00:06:31: (SMTP) [RX] 250-SERVEUR.mail-domain.local Hello [127.0.0.1][t 0] 02/06/10, 00:06:31: (SMTP) [RX] 250-SIZE 10485760[t 0] 02/06/10, 00:06:31: (SMTP) [RX] 250-PIPELINING[t 0] 02/06/10, 00:06:31: (SMTP) [RX] 250-DSN[t 0] 02/06/10, 00:06:31: (SMTP) [RX] 250-ENHANCEDSTATUSCODES[t 0] 02/06/10, 00:06:31: (SMTP) [RX] 250-AUTH LOGIN[t 0] 02/06/10, 00:06:31: (SMTP) [RX] 250-8BITMIME[t 0] 02/06/10, 00:06:31: (SMTP) [RX] 250-BINARYMIME[t 0] 02/06/10, 00:06:31: (SMTP) [RX] 250 CHUNKING[t 0] 02/06/10, 00:06:31: (POP3) [TX] LIST[t 0] 02/06/10, 00:06:31: (POP3) [RX] +OK Mailbox scan listing follows[t 0] 02/06/10, 00:06:31: (POP3) [RX] 1 17814[t 0] 02/06/10, 00:06:31: (POP3) [RX] 2 7749[t 0] 02/06/10, 00:06:31: (POP3) [RX] 3 8428[t 0] 02/06/10, 00:06:31: (POP3) [RX] 4 8971[t 0] 02/06/10, 00:06:31: (POP3) [RX] 5 11179[t 0] 02/06/10, 00:06:31: (POP3) [RX] 6 1790[t 0] 02/06/10, 00:06:31: (POP3) [RX] .[t 0] 02/06/10, 00:06:31: Downloading message 1 of 6.[t 0] 02/06/10, 00:06:31: (POP3) [TX] RETR 1[t 0] 02/06/10, 00:06:31: (POP3) [RX] +OK 17814 octets[t 0] 02/06/10, 00:06:32: Sending message 1 to the SMTP recipient m.fischer@mail-domain.com...[t 0] 02/06/10, 00:06:32: (SMTP) [TX] MAIL FROM: <prixtel-par-plein-30178@votremessage.net> RET=FULL[t 0] 02/06/10, 00:06:32: Downloading message 2 of 6.[t 0] 02/06/10, 00:06:32: (POP3) [TX] RETR 2[t 0] 02/06/10, 00:06:32: (SMTP) [RX] 250 2.1.0 Sender OK[t 0] 02/06/10, 00:06:32: (SMTP) [TX] RCPT TO: <m.fischer@mail-domain.com> NOTIFY=FAILURE[t 0] 02/06/10, 00:06:32: (SMTP) [RX] 250 2.1.5 Recipient OK[t 0] 02/06/10, 00:06:32: (SMTP) [TX] DATA[t 0] 02/06/10, 00:06:32: (SMTP) [RX] 354 Start mail input; end with <CRLF>.<CRLF>[t 0] 02/06/10, 00:06:32: (POP3) [RX] +OK 7749 octets[t 0] 02/06/10, 00:06:33: (SMTP) [TX] .[t 0] 02/06/10, 00:07:13: Timeout 'localhost' !!!![t 0] 02/06/10, 00:07:13: Failure hrResult (0x800ccc19) trying to deliver message id 1:[t 0] 02/06/10, 00:07:13: (no server response)[t 0] 02/06/10, 00:07:13: EVENT: The TCP/IP connection with the 'localhost' server was terminated while trying to access the '' mailbox. The cause may be server problems, network problems, a long period of inactivity, a connection time limit, or incorrect connection settings.[t 0] 02/06/10, 00:07:13: (AsyncConn[ localhost:25 ]) Connection to 'localhost' closed.[t 0] 02/06/10, 00:07:13: (POP3) [TX] QUIT[t 0] 02/06/10, 00:07:13: (POP3) [RX] +OK Sayonara[t 0] 02/06/10, 00:07:13: (AsyncConn[ pop.ameos.com:110 ]) Connection to 'pop.ameos.com' closed.[t 0] 02/06/10, 00:07:13: (AsyncConn[ pop.ameos.com:110 ]) Connecting to 'pop.ameos.com' on port 110.[t 0] 02/06/10, 00:07:14: (POP3) [RX] +OK POP3 dns1.ameos.com v2003.83 server ready[t 0] 02/06/10, 00:07:14: (POP3) [TX] USER mail-domain-com-philippe[t 0] 02/06/10, 00:07:14: (POP3) [RX] +OK User name accepted, password please[t 0] 02/06/10, 00:07:14: (POP3) [TX] PASS ************************[t 0] 02/06/10, 00:07:17: (POP3) [RX] +OK Mailbox open, 0 messages[t 0] 02/06/10, 00:07:17: (POP3) [TX] STAT[t 0] 02/06/10, 00:07:17: (POP3) [RX] +OK 0 0[t 0] 02/06/10, 00:07:17: Check for new messages: 0 (0 octets) total.[t 0] 02/06/10, 00:07:17: (POP3) [TX] QUIT[t 0] 02/06/10, 00:07:17: (POP3) [RX] +OK Sayonara[t 0] 02/06/10, 00:07:17: (AsyncConn[ pop.ameos.com:110 ]) Connection to 'pop.ameos.com' closed.[t 0] 02/06/10, 00:07:17: (AsyncConn[ pop.ameos.com:110 ]) Connecting to 'pop.ameos.com' on port 110.[t 0] 02/06/10, 00:07:17: (POP3) [RX] +OK POP3 dns1.ameos.com v2003.83 server ready[t 0] 02/06/10, 00:07:17: (POP3) [TX] USER mail-domain-com-tatiana[t 0] 02/06/10, 00:07:18: (POP3) [RX] +OK User name accepted, password please[t 0] 02/06/10, 00:07:18: (POP3) [TX] PASS ************************[t 0] 02/06/10, 00:07:18: (POP3) [RX] +OK Mailbox open, 0 messages[t 0] 02/06/10, 00:07:18: (POP3) [TX] STAT[t 0] 02/06/10, 00:07:18: (POP3) [RX] +OK 0 0[t 0] 02/06/10, 00:07:18: Check for new messages: 0 (0 octets) total.[t 0] 02/06/10, 00:07:18: (POP3) [TX] QUIT[t 0] 02/06/10, 00:07:18: (POP3) [RX] +OK Sayonara[t 0] 02/06/10, 00:07:18: (AsyncConn[ pop.ameos.com:110 ]) Connection to 'pop.ameos.com' closed.[t 0] 02/06/10, 00:07:18: "Retrieve Now" finished.All firewall ports are open, emails that hangs can be downloaded without errors with POP3/Outlook.It's not a matter of size the 6 emails had a total size of 60 KB, I already have set ConnectionTimeout and ConnectionInactivityTimeout to 9 minutes :[PS] C:\Windows\System32>Get-ReceiveConnector "Windows SBS Fax Sharepoint Receive SERVEUR" | fl AuthMechanism : BasicAuthBanner :BinaryMimeEnabled : TrueBindings : {127.0.0.1:25}ChunkingEnabled : TrueDefaultDomain :DeliveryStatusNotificationEnabled : TrueEightBitMimeEnabled : TrueDomainSecureEnabled : FalseEnhancedStatusCodesEnabled : TrueLongAddressesEnabled : FalseOrarEnabled : FalseFqdn : SERVEUR.mail-domain.localComment :Enabled : TrueConnectionTimeout : 00:09:00ConnectionInactivityTimeout : 00:09:00MessageRateLimit : unlimitedMaxInboundConnection : 5000MaxInboundConnectionPerSource : 20MaxInboundConnectionPercentagePerSource : 2MaxHeaderSize : 64KBMaxHopCount : 30MaxLocalHopCount : 8MaxLogonFailures : 3MaxMessageSize : 10MBMaxProtocolErrors : 5MaxRecipientsPerMessage : 200PermissionGroups : AnonymousUsers, ExchangeUsersPipeliningEnabled : TrueProtocolLoggingLevel : NoneRemoteIPRanges : {127.0.0.1-127.0.0.1}RequireEHLODomain : FalseRequireTLS : FalseEnableAuthGSSAPI : FalseServer : SERVEURSizeEnabled : EnabledTarpitInterval : 00:00:05AdminDisplayName :ExchangeVersion : 0.1 (8.0.535.0)Name : Windows SBS Fax Sharepoint Receive SE RVEURDistinguishedName : CN=Windows SBS Fax Sharepoint Receive SERVEUR,CN=SMTP Receive Connectors,C N=Protocols,CN=SERVEUR,CN=Servers,CN= Exchange Administrative Group (FYDIBO HF23SPDLT),CN=Administrative Groups,C N=First Organization,CN=Microsoft Exc hange,CN=Services,CN=Configuration,DC =mail-domain,DC=localIdentity : SERVEUR\Windows SBS Fax Sharepoint Re ceive SERVEURGuid : 5e5e380e-3ddc-42cc-aaf5-208d7690f98fObjectCategory : mail-domain.local/Configuration/Sch ema/ms-Exch-Smtp-Receive-ConnectorObjectClass : {top, msExchSmtpReceiveConnector}WhenChanged : 06/02/2010 00:05:56WhenCreated : 03/02/2010 15:27:33OriginatingServer : SERVEUR.mail-domain.localIsValid : TrueThanks in advance,Raphael

Personally I'm not aware of any registry settings or other obscure tweaks that let you increase timeout values on the POP Connector. You should address that question in one of the SBS 2008 forums. You could also look into "Email Rejected Due to Protocol Errors (Invalid Headers) and see if that helps"SBS 2008: Introducing the POP3 Connector http://blogs.technet.com/sbs/archive/2009/07/01/sbs-2008-introducing-the-pop3-connector.aspx Since you are using POP3 with plain text, Microsoft Network Monitor 3.3 can give you some more clues:http://www.microsoft.com/downloads/details.aspx?FamilyID=983b941d-06cb-4658-b7f6-3088333d062f&displaylang=en If none of this helps, you could try one of the 3rd party POP3 connectors, and see if they are more robust. Most, if not all, install as service that retrieve the mail and forward them to Exchange through SMTP. Thereby you can take advantage of your antivirus and anti-spam filters. There are trial editions, and the Eclarsys PopGrabber has a basic version is free. (There are more POP3 /IMAP4 downloaders around than provided in the link below.)POP3 connector in MS-Exchangehttp://social.technet.microsoft.com/Forums/en/exchangesvradmin/thread/061d064d-1ca4-4e91-88b6-b1d80c7d1ae8 Then of course, as you are likely to hear in the SBS forums: This POP3 connector is only meant as an interim solution. Use SMTP instead.SBS 2008 News Grouphttps://connect.microsoft.com/default.aspx Smallbizserver Forumshttp://www.smallbizserver.net/Default.aspx?tabid=53 MCTS: Messaging | MCSE: S+M | Small Business Specialist

Thanks for your answer, but with updating the HP network driver the problem could be solved Regards, Raphael