Blocked email

[linoverdows]

Hello,

When I visualize my emails with roundcube, my received messages are in grey with an icon ( blocked circle). I manage to consult them via the roundcube but I do not see them on my e-mail application (thunderbird and outlook).
What means this error?

Picture : https://image.noelshack.com/fichiers/2017/17/1493119174-img.png

Thx

[alec]

This is not an error. These messages are marked for delete, but not yet expunged.