K-9 V6 doesn't send Emails and receives mostly in WLAN environment

[A. King]

The Device is a Samsung S10 5G with actual Firmware.

Any advice would be welcome.

Alex

[no name]

Same problem here - but only when sending mails. My workaround is to change the smtp mailserver address to its ip address. In my case the wifi network and the mailserver have ipv6 addresses, but the mailserver's mta has no binding to :::25 due to other reasons. I ask myself why K9 does not recognise this obvious problem and falls back to IPv4.