Attachments sent from Outlook/Exchange arrive corrupt

[Mark D. (GY)]

We have a single exchanged 2003 server setup with Outlook 2003. There seems
to be no defined pattern to it but sometimes when sending attachments in
messages from outlook, they arrive at the recipient corrupt.

It seems to happen a lot to video files but also sometimes to pdf/xls/doc
files, etc.

I'm not sure if this is an Exchange problem our Outlook problem. Sending the
same attachement from the same Outlook client, but via another smpt server
(ie not exchange and not mapi) works without any problem - so Im guessing its
a server problem.

I've ruled out AV software and we have no exchange connectors in use other
than the standard.

Anyone else come across this?

 

[Mark Arnold [MVP]]

We have a single exchanged 2003 server setup with Outlook 2003. There seems
to be no defined pattern to it but sometimes when sending attachments in
messages from outlook, they arrive at the recipient corrupt.

It seems to happen a lot to video files but also sometimes to pdf/xls/doc
files, etc.

I'm not sure if this is an Exchange problem our Outlook problem. Sending the
same attachement from the same Outlook client, but via another smpt server
(ie not exchange and not mapi) works without any problem - so Im guessing its
a server problem.

I've ruled out AV software and we have no exchange connectors in use other
than the standard.

Anyone else come across this?

I know you said you've excluded the AV but if an internal message
between users is sometimes getting corrupt but nothing going outbound
is then I'd either take another look at the AV or take a look at the
event logs. Increase the diags logging on store events to see if
anything crops up that isn't right.

 

[Anonymous]

What AV/anti-spam program are you using. Sometimes these AV/anti-spam programs change the original message, which causes
corruption.

Here is what you do:

1. Send the same message to your Exchange and the other SMTP that works
2. When the message comes to the recipients box, save the actuall message to a text file with all headers and compare
them with WinMerge or any other program that shows you a line-by-line comparision.

If you see a different, try disabling your AV temporarily and see if that fixes the problem.