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wesgarrisonFlag for United States of America asked on

PDF Attachments renamed to ATTxxxx.dat in Outlook 2003

I've looked around EE for this issue and haven't found the answer I need yet.

I have a website that sends PDFs as an email attachment. I get the PDF fine and it's named as it should be. Two of my users have Outlook 2003 (on XP SP2) and their attachments are renamed to "ATT12323.dat" (the numbers change...)

I found a suggestion that the file was too big.  It's only 60 KB.
I found a suggestion that the filename was too long.  It's only 12 characters.

People suggested sending in text mode, which I am.

Again, I and other users get the email just fine, it's Outlook that's renaming it for some reason.
The user's receive other PDFs, so I'm a little baffled as to why it's happening for some and not others.
Email ClientsOutlook

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8/22/2022 - Mon

Hello wesgarrison,

Format of sending email is important.  But you are already sending in Plain Text format, which is good.

The only other possibility is that the antivirus is changing the attachment format.  Temporarily disable the antivirus check of incoming email and test.

Hope this helps!

Okay, I'll check that out. These are two separate users, different environments, but same result.  I wouldn't think that two different virus programs would have the same behavior, but it's certainly something I can try.

Definitely not caused by the virus scanner.  Both users disabled theirs and received the same results.

I sent a pdf to each of them as well (from my computer using Apple Mail) and they received them as a PDF okay.

The server sending the file is a sendmail server, if that matters to anyone.
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