[sylpheed:37223] Re: "503 AUTH command used when not advertised"

[Frank Elsner]

On Sat, 16 Dec 2023 15:13:53 -0500 k0 at trixtar.org wrote:
> 
> Possibly as a result of config changes at my
> DNS hosting provider, my OUTBOUND email just 
> died without any warning. Bundled with my
> virtual web server there is a mail server 
> which I don't muck with as such for lack of 
> competence. 
> 
> "503 AUTH command used when not advertised"

This means, that you tried to authenticate but the SMTP server did not
advertise authentication.

Mostly this happens for non-encrypted SMTP sessions because authentication
should be done over encrypted copnnections only.

Ensure SSL is working and your authentication will also work.