> When I send a spreadsheet (xxx.ods) as an attachment in an email (I use
> Thunderbird), it is received as a "Read-Only" file. The only Options that I
> know of don't appear to force it to be Read-Only (see attached). So how do I
> disable this restriction?
Could it be you are trying to open the attached file directly from
Thunderbird? You have to save it and open it afterwords.
When you send something as an attachment in an email, and the recipient
clicks on the file IN the email (without saving the file somewhere on
his machine first), then the computer opens the file as a "temporary"
creature in a "temporary" place. That "temporary" file is always "read
only". If the user can and does make any changes and wants to save the
result, he cannot just "save" the result. Instead, he must choose "save
as", and give the file a permanent home and name on his machine.