The attached crashlog is a case where a message when it becomes active calls GR. GR indicates a dsi error. If I select ignore dsi error, SimpleMail goes into constantly busy mode, that is, the pointer just remains busy.
The system is unaffected by all this and other programs continue to work. SimpleMail does not respond though its windows can be moved. No buttons are active and no actions attempted have any effect. Selecting the close window gadget does show it was selected but it has no effect.
Crashlog from GR when message causes a dsi error