[Automessage] No check if blog still exists?

I just noticed that the plugins sends messages (blog level messages with time delay) to users whose blog do not exist.
i´ve set up a automessage to my users with a blog on my multisite with time delay of 30 days. if a blog gets removed in the meantime, the plugin still sends out the message and does not check if the blog is still existing.

could you please check on your site if this is a bug on my site or if the code is not checking if the blog still exists, because this may be interpreted as spam and weak user management.
tnx, Eric