Attachment error (format or extension is not valid)

[cyberzork]

It seems like it is having for different types of attachment but mostly excel.

Ok well if your happy to try the latest upcoming build V10.3.4341 to see if that fixes the issue, see the following link below for details.

Note: If you do try the latest build version, backup your current version first via “Menu / Backup” incase you need to restore for any reason. Also close eM Client before updating.

eM Client 10.3 - Upcoming build preview

It may have seemed quiet recently when it comes to updates, but we have been making steady progress behind the scenes as we prepare for our next major release, eM Client 11. But before that, we of course have a version 10.3 update on the way, including several improvements and new features based on your feedback, which is why we couldn’t push it as a normal service update yet! We’d appreciate your help testing this version before it’s released as an official update. Highlights include: Smar…