Just tested my modest and it seems to do transfer. One more nail to Modests coffin (It´s just freak show of all email clients what I have seen. I use only webmail)

https://bugs.maemo.org/show_bug.cgi?id=9294
https://bugs.maemo.org/show_bug.cgi?id=2582

Maybe you can test
http://maemo.org/packages/view/claws-mail/
http://maemo.org/packages/view/trojita/
http://maemo.org/packages/view/qmfmail/
All seem to be under developement so normal warnings apply.