I like the “Horde” free web-based groupware

• https://en.wikipedia.org/wiki/Horde_(software)

My ISP uses Horde to provide me with webmail access.

It supports drag-and-drop for moving e-mail messages from the current folder to another folder. Wow, impressive for a browser / web application!

Open questions:

• how do I get all header lines of an e-mail message displayed? I don’t mean “show me the source!” – the last version of Horde, that my ISP let me use, had a feature to choose amongst a few sets of header lines
• below “New Message” they list a deliberate couple of IMAP folders, that they remove from the nested list below – I don’t like that
• …