Thunderbird sending excel attachments as xxx.dat



10 years ago
9 years ago


(Reporter: billchilds, Unassigned)


1.8 Branch
Mac OS X

Firefox Tracking Flags

(Not tracked)


(Whiteboard: closeme 2009-12-30)



10 years ago
User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv: Gecko/2009011912 Firefox/3.0.6 GTB5
Build Identifier: (20081209)

I am using Mac OS 10.5.8, Thunderbird, Microsoft Excel 2008 for Mac.  
Problem is every time I send an email with an excel attachment (.xlsx) to another Mac user also running 10.5.8 and receiving mail via VMware and Outlook.  Every attachment has the suffix stripped and replaced with .dat and is unreadable.  I send the same attachment using Entourage from my Mac to the same person and the attachment goes over fine.  So same attachment, same other variables, just one mail app sends it without issue and the other does not.

Reproducible: Always

Steps to Reproduce:
1.compose email via thunderbird
2.attach excel file (.xlsx) - use Microsoft Excel 2008 for Mac
3.send email
Actual Results:  
Recipient receives file but it has now been renamed to filename.dat vs filename.xlsx and is unreadable.

Expected Results:  
Recipient should be able to receive and open the file.
mimetypes.rdf in your profile may be messed up somehow. Tried deleting it?

Comment 2

10 years ago
Yes, I removed it completely and restarted Thunderbird but no change.
Component: General → Attachments
Product: Thunderbird → MailNews Core
QA Contact: general → attachments
billchilds, do you see this with version 3?
I can't reproduce on windows with 3.0.1pre
Whiteboard: closeme 2009-12-30
Version: unspecified → 1.8 Branch
RESOLVED INCOMPLETE due to lack of response to last question. If you feel this change was made in error, please respond to this bug with your reasons why.
Last Resolved: 9 years ago
Resolution: --- → INCOMPLETE
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