Send SMTP Mail fails with Error 'Unknown"

Thanks for this App.

A little feedback:

I struggled with the setup, because of a cryptic error message, would be nice to improve that:

When i first tried to send a Message, after entering the Keystore password, the App showed a toast

‘Sending message…’

And immediately after, another one that said

‘Unknown’

I guessed my config. was the Problem, but i copy pasted the SMTP Settings from Thunderbird, so i did not see how it could be a config error.

After a while, i DID find a typo that somehow got in…

So, making SMTP errors more explicit might help others in the future.

PS:

I enabled the ‘debug’ checkbox in hope to get more output, but no luck…

What does it do? Found nothing about it in the reference.