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Missing Email Attachments
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Posted by: wurzell
Ok, here's some background before I get into the problems I'm having.
Running four servers with Win2k
Dedicated email server running Exchange 5.5
Clients using Outlook 2000 SR1 (with Office 97 SR2b)
Client OS ranges from Win98 to WinXP
Basically we have an intermittent problem where emails sent with attachments get through, minus the attachment. It only seems to be happening to external addresses although it has happened once internally (over the 3 months or so that we've suffered).
I've sent an email with an attachment to an external address where the guy has a standard dial-up account (56k modem) and it took him 20 mins or so to collect this one email, which suggests to me that the attachment is still there, just hidden somehow?
Also, on the internal failure, the list in the Inbox showed the little paperclip icon, clearly indicating that the email contained an attachment but when opened it wasn't there.
Please help ... I've tried everything from removing all of the antivirus software on the server to scouring the MS Technet and downloading/installing every patch that even hinted at this kind of problem.
Cheers.
Wurzell.
Posted by: Shalome
Antivirus software on e-mail servers can be set to strip attachments or block attachments with viruses. You may want to check your e-mail servers or ask the client with the issues to check theirs.
Posted by: wurzell
Thanks for the swift response.
I've entirely uninstalled the av from the exchange server and have checked and double checked the client's.
Even so, it's still very intermittent ... a particular client can send one email and no attachments get through, then re-send two minutes later and it get through fine.
Any more thoughts, 'cause it's got me stumped 
Posted by: koguma
No it's a problem brought by the SR1 of Office 2000... EXE and other "potentially" dangerous file extensions are simply blocked. In fact you should have the same effect by sending an email to a coworker with an EXE file attached.. at least by the sending Outlook should give you a warning message. We have about the same config here except running on NT Severs, but with W2K and NT clients, Office 2000 SR1 and Exchange 5.5. The limitation is coming from the SR1 not from Exchange... before we installed SR1 it was working fine.
At the moment I couldn't find the setting to avoid this as in Outlook Express (located in Option -> security...).
So one way is to ask the sender to send and exe (or other file) by droping the last caracter of the extension (ex : Filexxx.ex)
Posted by: wurzell
I thought that at the beginning, after ditching the av on the server. It does however effect all files going out, not just the "dangerous" ones. The files coming in are completely unaffected by this and we receive them without any problems.
Posted by: Shalome
Could it be a problem with file size and the mail queue size?
Posted by: wurzell
I've tried that .... there are no restrictions set for anyone's mailbox or limits to the size of the mail queue.
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