I am running AquaMail free (will upgrade to the pro version if I can get this issue sorted) with 2 IMAP email accounts but currently I am unable to delete emails from my mail server on the phone. If I delete the emails on the phone they disappear from the phone but are still present on the mail server. The same is true for trying to move emails to different folders. My mail host in one.com - I read somewhere that Aquamail relies on UIDPLUS to move messages on an IMAP server - is that the issue? It's a shame because K9 mail worked fine doing this but AquaMail is better laid out so I'd rather use it.
