Chuck Hallenbeck chuckh at
Wed Feb 16 11:10:50 EST 2005

If you have a dynamic IP address and attempt to send mail directly from
your own system instead of going through your ISP, you will run into a
surprising number of recipients who will refuse your mail in the belief
that you are a spammer. Also, the default sendmail configuration
nowadays disallows relaying. i.e., outsiders cannot use your sendmail
to relay mail through you and your ISP to the world. With your own port
25 open, mail coming to you is accepted, but mail intended for others
is not. To change that feature you have to select "promiscuous"


On Wed, 16 Feb 2005, Sean McMahon wrote:

> There's certainly nothing that says you have to send mail through your isp smtp
> server.  You can but don't have to do it this way.  Use an mta only if an mta is
> necessary.  Be careful about what you allow to access your mta esp. if it sends
> mail from your system directly to the internet.  I've never heard of a system
> where you have to get your mail before you can send mail.

The Moon is Waxing Gibbous (56% of Full)
"Things are in the saddle, and they ride mankind." Ralph Waldo Emerson
Personal site, Software site

More information about the Speakup mailing list