I'm aware of the production code thing and switch it off in public, never fear. This code is production but only ever used by me so I like to keep it on so I know when things aren't ideal. Really, your guarantee is invalid. I do understand it's best to fix it and will spend some more time doing it but there are no last gasps, I can assure you. Something is obviously annoying Mime::Lite but it sends every mail perfectly and then the script carrys on fine and does lots of other stuff too. In fact, these errors appear at the very start, before anything has happened. Then stuff happens, then the emails are sent, then more stuff happens. So it's a funny type of error because it's not fatal but does appear when fatalstobrowser it is on. Thanks for the eval thing...