Hi,

  In mail "'net/pop' bug: username/pass containing %-sign"
    zoranlazarevic / yahoo.com (Zoran Lazarevic) wrote:

> 'net/pop' library (POP3/APOP client) has a bug: Authentication fails
> if username or password contain %-sign. The library uses:
>   ...get_response('USER ' + account)
>     ... sprintf(fmt, *fargs)
> Percent sign '%' in a username/password are interpreted by sprintf()
> as format specifiers.
> 
> The fix is in POP3Command.auth() line#793. Instead of

Thank you for your report.  Fixed now.

Best Regards,
Minero Aoki