>>> As an aside, does anyone know if virii/worms like Sobig, etc. that
>>> use their own SMTP server would be thwarted if Sympatico forced
>>> authentication on their SMTP servers?
>>>
>>
>> You mean for double authentication within their network although the
>> client is already identified by IP (being dialled in to them)? I think
>> almost no ISP does this.
The unfortunate problem is that there is no universally supported method with
email clients nor email servers.
Some email clients can authenticate via SMTP (Outlook Express can), some
clients can send via POP (Eudora can), and few but some mail servers support
either.
Some ISPs will also block TCP port 25 to anything but their own mail server.
Adam
