Roundcube seems to own it. Not that many Foss clients to choose from, and RC see...

		creeble on Jan 26, 2018 \| parent \| context \| favorite \| on: How to Run Your Own Mail Server (2017) Roundcube seems to own it. Not that many Foss clients to choose from, and RC seems most robust. The only feature I've ever longed for is a simple way to include a non-reply email in another email message. There's probably a plugin for it.