[KLUG Members] Sendmail configuration

[Jason Edward Durrett]

Hi Deepan,

The best thing for you to do is set up your mail server properly.  The
first step is to get a domain name and set up a reverse lookup.  You
won't be able to send mail to a good number of other mail servers if you
do not do this.  Plus, if you continue to send mail as you are doing you
risk getting your ip address on a blacklist.

On my mail servers, for example, I do not accept mail from a server that
does not have reverse lookup.

That is, your Public IP needs to resolve to a host name and your host
name needs to resolve to the same Public IP.  This is done in your DNS. 
Once you get that, modify your sendmail configuration so it is not
sending mail as it is now.

Let me know if you need help with DNS (using bind I suppose). . . I
haven't used sendmail for a long time so someone else on the list might
be able to help you with that.


Jason Edward Durrett
B. Shackman Company

Phone: 1-269-484-1000
Fax: 1-269-484-1010
web:  www.shackman.com




Deepan wrote:
> Hi All,
> I am using sendmail via php mail function to send
> emails. However few servers reject my mails with
> the error 'Sender address rejected: Domain not
> found', since mails from my server are sent as
> email at localhost.localdomain. How do I change this
> to a valid domain name ? We only own a public IP.
> we dont really have a domain name, is it possible
> to use IP ? 
> Regards
> Deepan
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