Hello, since a few years I am using OpenOffice Calc (4.1.3 version, 32 bits) for edit xls files and then I send them by mail. My default application for mail is Mozilla Thunderbird. I hadn't any problem until now: yesterday, I updated Mozilla Thunderbird version to latest version: 115.9.0 (64 bits) and now I get the following error: [img]https://i.imgur.com/YWn0bHC.png[/img] (OpenOffice could not find a working email configuration. Save this document locally and attach it to the email.) I have seen in some posts that solution is reinstalling Thunderbird, but in 32 bits version, but if it has worked until now... Kind regards.