Re: [vps-mail] reject=553 5.1.8 - Domain of sender address does not exist

[Bennett Lanford <benlanford@xxxxxxxxx>]

On 9/9/05, Bennett Lanford <benlanford@xxxxxxxxx> wrote:
> 
> 
> 
> On 9/9/05, Andrew Brosnan <andrew@xxxxxxxxxxx> wrote:
> > 
> > 
> > While myclientsdomain.com <http://myclientsdomain.com> exists, the 
> > hostname 'db' is from one of the
> > machines on their network and is behind a firewall. 
> > 
> > Could anyone clue me in to why this is bouncing 
> 
> 
> You identified the reason above (the sender's domain is unresolvable). 
> 
> and what I need to do in
> > order to receive the mail?
> 
> 
> You could insert the following FEATURE line in your sendmail macro 
> configuration file and then generate a new sendmail.cf<http://sendmail.cf>
> :
> 
> FEATURE(`accept_unresolvable_domains')
> 

A less spammer-friendly solution would be to add a DNS entry for 
db.myclientsdomain.com <http://db.myclientsdomain.com>. By using 
accept_unresolvable_domains to allow e-mail from
db.myclientsdomain.com<http://db.myclientsdomain.com>,
you are also allowing in potential spam from every other made-up 
(unresolvable) domain name.

Just a thought.

-- 
Bennett Lanford <benlanford@xxxxxxxxx>

There are 10 kinds of people: those that understand binary and those that 
don't.