upvote
K9 with the old interface, the original one.

I picked K9 among the other clients because of that interface so I was in that 50% of users that were pissed off by the new UI. Luckily email protocols did not change and I can still sideload the APK on all my devices.

reply
I have used Aquamail https://www.aqua-mail.com/android since the mid 2009 on my android devices. It's been solid and it is super customizable. I think the only downside is they changed their payment model a while back and if you didn't buy it back then it costs monthly fee or a $99.99 for a lifetime license. I highly recomend it if you do a lot of email on your phone.
reply
> $99.99 for a lifetime license

Yeah, just a small hiccup. I can buy a whole phone with a hundred dollars.

reply
I use k9/thunderbird for private mail. But for my org's on prem exchange account I use nine folders, as I also want to sync calendar and contacts. (We have a davmail gateway but it has quirks)
reply
I use ProfiMail on Android. Loving the app since Symbian era. K9Mail is ok too.
reply
Isnt K-9 Mail supposed to join forces with Thunderbird? K-9 Mail works fine for me.
reply
Thunderbird for android is K9 just rebranded afaik.
reply
Already did. Both should be essentially the same, different skins and some rather miner functional differences afaik. Using TB on Android and I agree with critics, like dysfunctional search etc
reply
I use FairEmail in Android.
reply