mail-problem over t-online

[Peter Hansen]

Klaus Reinhardt wrote:
> 
> Testing python and email I adapted this script:
> 
>         host=smtplib.SMTP('mailszrz.zrz.tu-berlin.de')
>         host.sendmail(zwi_eck(From),zwi_eck(Tp),al)
>         host.quit
> 
> This is working, when I'm directly connected to my
> old ISP TU-Berlin via ISDN. But the same is failing,
> when I'm connected at t-online via ADSL, with
> authentification required .. Providing my log and pass
> produces errors, too.
> 
> Pop3 is working in both cases.
> 
> Who can give me a hint?

Try connecting manually with TELNET first, to ensure you
have a clear channel to that server and port.  Many ISPs
will block port 25 except to their own mail server, to 
prevent you using them to send spam through other systems
and having them suffer the consequences...

-Peter