I install Gravatar and… I can’t longer send a test of my newsletter !?

Hi,

(sorry for my language I’m French)

yesterday I sent my last newsletter : no problem. Today I wanted to send a test of a new newsletter and a window confirming the sending. However the shipment never arrives (not in spam either).

I tried several emails, none are working.

The only thing I have done since yesterday is to load an image on Gravatar.

I just removed this image, but it doesn’t work anymore. I no longer have the default avatar of WordPress (the gray silhouette) now I have the initials of my name on a blue background as an avatar.

What’s wrong ?