K9 Ver 5.208 Samsung S7. Been using K9 for several years on older S4 device, loved it. With newer android K9 will not reliably get email. Mostly I have to manually request it. I have tried several of the claimed tips to fix it. I had hoped the claim of the problem being fixed for this version was true. Nope, after a couple of days use, not fixed. I'm tired of fighting it. I really wish it was fixed but I'm wasting my time with it.
I have to admit, I was hesitant to take K-9 Mail for a spin because it's not much to look at and it didn't appear to offer anything particularly special... But whilst others may look pretty, I don't trust some of them as far as I can spit, so I decided to try-out K-9 Mail - and I'm glad I did! The everyday user will find that this is a fantastic e-mail client, while power users will be in heaven with the enormous amount of options and settings readily available. My only real complaint - and it's a big one - is that at the time of writing, K-9 Mail does not support digital certificates (S/MIME) for signing e-mail messages... Add support for that, and my (Google Play Store) review will be much higher.
Used K9 for many years but now notifications totally not working on Android 6.0.1 Galaxy A5. In spite of settings configured to notify of incoming emails. Have to dump this and use Gmail app, which notifications work ok. Latest v5.208 still not working properly. There's still no email notifications when any email comes in. The only way to know if there's any new emails is to manually open the app.
Have used, loved and recommended K-9 for ages, but it has stopped notifying me of emails. Sometimes it does, sometimes it doesn't and I have to refresh manually. I gave no idea why. This random intermittent bug makes it no good for me any more. I've missed too many important emails...
Been using K9 for nearly 4 years now very user friendly and has performed all what such App should have. However, right now it allow mail movement to another folders within the same email ID but it would be better if it allow mails to be able to move from different email ID. K9 team please consider as many folks out there believe is using more then I email ID
*EDIT!! Moderately new bug!!!!!* Usually LOVE this app - ALL I use, for MANY years ... but major problem with last update!! Outgoing emails will NOT send unless I'm on wifi (3G and 4G working fine, but emails won't sent, get stuck in outbox until wifi goes on (getting notification saying problem sending this email). Usually goes out perfectly fine once on wifi. This is a NEW problem!! ****I'm hoping the makers will see this review and fix this*** PLEASE!!??
Fixed bug where automatic synchronization wouldn't restart after the device exited doze mode