I use K9 mail since 10 years (on Samsung Galaxy S2, S5 then now S9+ updated).
I was IT manager, so IMAP and setting a mail client is easy for me.
Since the big update that I received few weeks ago, I have a big problem: sending mail is not possible.
The mail stays in the SENDING BOX (boite d’envoi in French).
Everything is good. I checked the setting, the test of “sending mail” is ok.
I didn’t change anything on the server side.
Everything works well on my PC with my mail client (thunderbird).
The recipient address is valid (I tried with different).
In the IMAP SENT folder, I don’t see all my email that I sent before (from K9 mail and my PC client).
The setting of folders is good, I did it again because the setting of folders was reseted after the big update.
K9 mail doesn’t give any error message. The mail just stays and don’t go.
I tested with a different Android mail client (Blue Mail) and it’s working well, with the same setting.
One thing more that I noticed.
In the INBOX folder, when I pull down to refresh, the REFRESH LOGO is turning non stop, and… nothing append. The sync is not working when I start it manually.
Plase, do you have any solution ?