Problems with Office 2007+ attachments in Eudora

Problem:

When you send an Office 2007 docx, xlsx, etc. file attachment in Eudora 6 or 7, the recipient receives the file without the trailing "x" on the attachment file. Thus, the file will not open correctly until the x is added back to the file extension.

Solution:

Close Eudora

Locate and make a backup of Eudora.ini
Open Eudora.ini
Delete the entire [Mappings] section, ONLY the [Mappings] section. (BE CAREFUL)
Save and Close Euroda.ini

Locate and make a backup of deudora.ini
Open deudora.ini
Directly under the [Mappings] section, and before all the other entries, paste the settings below.

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both=docx,,,,
both=docm,,,,
both=dotx,,,,
both=dotm,,,,
both=xlsx,,,,
both=xlsm,,,,
both=xltx,,,,
both=xltm,,,,
both=xlsb,,,,
both=xlam,,,,
both=pptx,,,,
both=pptm,,,,
both=potx,,,,
both=potm,,,,
both=ppam,,,,
both=ppsx,,,,
both=ppsm,,,,
both=sldx,,,,
both=sldm,,,,
both=thmx,,,,

---

I should look like this:
[Mappings]
<the settings above>
<then the original data>

Posts that helped

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Eudora Forums
Problems with attaching .docx Word 2007
http://eudorabb.qualcomm.com/showthread.php?t=12600

Introduction to new file-name extensions
Applies to: Microsoft Office Excel 2007, PowerPoint 2007, Word 2007
http://office.microsoft.com/en-us/help/HA100069351033.aspx