RE: [cobalt-users] OT: ISP's and Port 25 blocks

["agility" <webmgr@xxxxxxxxxxxxxxxxxx>]

> > > I'm sure that many of you are aware of have been directly affected by
> > > various ISP's blocking port 25....
> > > About 95% of our clients are small businesses which we allow for them
> > > to relay through our servers (smpt=mail.their-domain-name.com). Within
> > > the last few days, we began receiving calls from our clients that they
> > > couldn't send email - and it took us a few hours to realize this was
> > > due to a local ISP initiating a port 25 block for their residential
> > > users. We contact....
> >

There was an article in the June03 SysAdmin magazine on this subject.
titled 'Improving Sendmail Security by Turning it Off'

Quoting from the magazine (pg 8) "Having a sendmal daemon listening on
25/tcp opens the system up for remote exploits such as the recently
announced overflow issue."

Paul.

> >If any of you are interested in the official word about this from
> >Mindspring/Earthlink, go to Google and query for:
> >
> >mindspring mail server spam
> >
> >The first item called "Support Center", click CACHED and then cancel
> >(about 6 times) to the authentication dialogs. It will finally let you
> >in to read the page.
>