When I send message Outbox shows 1 message pending but there is no message to be seen in folder, after sending message arrives at destination but no message in sent folder either in K9 or webmail. However if I send from PC message shows in K9 and webmail This is with 5.802 upload sent messages is ticked in setting
That’s a small display bug and shouldn’t be a problem. The side bar counts are not updated after sending.
Check your folder settings. Maybe the wrong folder is selected for saving the messages in. Settings » Account » Folders.
Thanks, the setting for Sent folder was the default Automatic, I changed this to Sent and it seems to be working OK now.