Yeah. No AV on the server it's all done by the ISP. The .co.uk is with one isp, .com with the other, and the issue seems more apparent with the .co.uk ISP than the .com one (ie we cant see it with the .com at all but they don't use that domain too much so it's not assured).
Bugger this for a game of cricket !!! -----Original Message----- From: Michael B. Smith [mailto:[EMAIL PROTECTED] Sent: 23 January 2008 14:21 To: MS-Exchange Admin Issues Subject: RE: Corruptions - redux You may need to look at the physical messages themselves to determine if you can determine a pattern of corruption. As another poster said yesterday (I think it was yesterday), it's probably the A/V software somewhere along the way. Regards, Michael B. Smith MCSE/Exchange MVP http://TheEssentialExchange.com -----Original Message----- From: Oliver Marshall [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 23, 2008 8:42 AM To: MS-Exchange Admin Issues Subject: RE: Corruptions - redux Well, we've had a few reports now from mac users to internally, all running Apple Mail (IMAP) or Entourage so I'm ruling out any client OS/Outlook version oddness. We had another one this morning that got corrupt, but that was smaller than our test emails, and so I don't see that file size alone can be the cause. I can't see we have any option at the moment other than to move to emails being dropped in to a pop account, and then collected by the server from there. This way we can see if the original email is corrupt or not. As the ISP has pointed out in one of their not-really-helpful emails, if the connection from their server to the exchange server was being cut off mid-send then the email would (should) be marked as incomplete and then resent. Olly -----Original Message----- From: Michael B. Smith [mailto:[EMAIL PROTECTED] Sent: 23 January 2008 13:14 To: MS-Exchange Admin Issues Subject: RE: Corruptions - redux No. Outlook and Exchange communicate using an RPC based protocol - MAPI. MAPI has in-built checks to verify that what is sent is what is received. Even the earliest of mail user agent protocols (POP) had some checks - a POP client is told how large, in bytes, a message is and uses that to verify an incoming message. Regards, Michael B. Smith MCSE/Exchange MVP http://TheEssentialExchange.com -----Original Message----- From: Oliver Marshall [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 23, 2008 6:08 AM To: MS-Exchange Admin Issues Subject: Corruptions - redux Chaps, On my hunt for corruptions in emails, can you answer this for me. Say an email with an attachments is received by an exchange server perfectly normally without any corruption. Is it possible that, when the outlook client in exchange mode displays the email, that a corruption in the connection between the client and the server is able to corrupt the copy of the attachment on the server itself? That is, if the client were a laptop using wifi, and the wifi signal was shitty, would that poor connection be able to corrupt the attachment when the client tried to open it ? (I assume yes is the answer). If so, would that corruption be one off (ie try again later and it's fine) or would it corrupt the attachment in the datastore perminently? (ie try again later and its now always corrupt) ? Olly ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
