This is a fresh thread, originally started on another, it was suggested there to make a fresh one.
First in all my years of using K9, I am not aware of this ever happening to me before.
People on K9 5.8 might need to check all their email is actually, not only sending properly, but actually getting to destination.
Since the very day of putting the new K9 5.8 version on, it turns out now that some emails, even though they show as having been sent, and are in the sent folder, have not arrived at destination(s).
This only happens to some recipients more than others. Perhaps people on shared hosting? I cant be sure.
I have also logged into a web interface for my account, and I can successfully send emails to everyone and anyone I’m testing for, some of whom have not got my K9 5.8 sent emails recently.
Plus all the K9 sent ones are showing in my sent folder, on the web interface (Horde), and in Thunderbird on my laptop, as well, even the ones that have not been received at the other end(s).
I checked the K9 5.8 Send SMTP server settings all passed ok.
Three of us sat arround in a lounge, and using my K9 5.8, sending email to two people on the To line, then one in the to the other in the CC, and then viseversa, one person always got them all, and the other man never.
They were using older un-updated K9s on Hostgator accounts, and also Gmail trough the browser, and the Gmail app on Android.
— But the man, call him Joe, who never got my K9 5.8 sent emails, could get them both in his K9 (Hostgator based account) and his gmail, if I sent them from Horde Web interface from my very same account.
Joe could send me emails successfully, but my K9 5.8 replies to him are never received either, but when I replied from Horde or Thunderbird on PC he could.
I have also gone on to successfully send email to him from Thunderbird on my laptop, from and to, the same identical accounts.
I’ve uninstalled K9 5.8, and followed the github link provided on another thread here, for downloading the 5.6 .apk and installed it for now.
Sent some trial emails, and they all went straight to their destinations no problems at all.
(It turns out that from the date I put K9 5.8 on, Joe had not received a single email from me until I took K9 5.8 off and put K9 5.6 on instead!
And now all is fine.)
It also turns out K9 5.8 was not always getting through to all the people I thought were mostly ok.
Found out about other missing emails, that still show as sent in my sent box, which were actually mission critical – very sad K9 5.8 did that.
So the K9 5.8 sending problem is fickle.
I’m sticking away from K9 5.8 for now.
I’m on K9 5.6 at the monent, was K9 5.7 stable and safe to use?
Should I use K9 5.7 until K9 5.8 is fixed?