Re: [cobalt-users] Pros & Cons of change to Sendmail and can you do this on a Qube 3 ?

["Neil James" <ned@xxxxxxxx>]

> Hi Folks,
> 
> Was reading something at lunch and the writer said he "believed" that
> Sendmail already supported what he was proposing - configuring mail
> servers to drop e-mails from servers whose IP does not match the FROM
> domain.
> 
> I guess first, CAN Sendmail be configured to do this and if so is that
> supported on the Qube 3.
> 
> And then of course are there any negative ramifications of doing this
> ? Obviously it will reject any sender email not ID'ing the sending
> email server but is there legitimate email that comes that way ?
> 
Good grief yes!

All my email goes out that way for a start. I manage lots of domains and use a mail client which 
allows me to easily switch identities and send mail out as somebodyr@xxxxxxxxxxxxxxxxxx, 
with a matching reply-to address.

For convenience nearly all the e-mail addresses I use are configured to forward the mail to the 
ISP mailbox to simplify collection, and all mail is sent out using my local ISP mail server. This 
daft proposal would put a stop to that right away.

In fact something like that did happen last month when my ISP introduced a spam filter system 
which initially was configured to reject all mail not sent to or from an address in their domain. 
Naturally every business in the area with their own domain name but using the local ISP for net 
access suddenly found their mail wouldn't work - mine included. 

It only lasted one day as tech support were inundated with complaints. One techie told me they 
hadn't realised so many people used their own domains! 

Cheers,

Neil
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