On 2021-12-15 23:04, raf wrote:
How could I get an Android client and a Postfix server work together please?
It's just a guess, but maybe the problem is ECDSA. If you add an RSA key as well, it might work. Does that sound plausible?
or simply try smtps if submission fails on android i use aquamail on android with succes smtps / imaps (ssl not tls)