I am using Roundcube latest version on Windows, with hmail server.
When I reply to a message from someone that is longer than just a few lines (eg 10-15), roundcube doesn't send the message, it just says "Sending Message" in the bottom right for about a minute and then that disappears and the message doesn't send.
When I reply or compose a very short message it sends fine - its only longer messages that don't send.
Anyway know why this might be?