Sendmail - RH 6.1

I have one machine that runs network monitoring.  When an event occurs, I need the network monitoring software to send an email.  I tried to set up sendmail, but I keep getting errors like "sorry, that domain is not in my list of allowed rcpthosts".  This machine is behind a filewall with NAT, and I just need to get the mail out. Help!?
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

ihardingAuthor Commented:
Edited text of question.
Is it your machine that gives these errors? or the machine that you are trying to deliver to? Can your machine deliver mail locally?
Use linuxconf or webmin. Modify your  to make this machine deliver/accept mail for your domain or your network-ip range
The Ultimate Tool Kit for Technolgy Solution Provi

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy for valuable how-to assets including sample agreements, checklists, flowcharts, and more!

ihardingAuthor Commented:
The errors are comming from my ISPs machine.
THis error is probably caused because your system does not have a resolvable domain name or address. The ISP is rejecting your connection because of a fear that you are spamming. You would need to reconfigure your system so that your system has a recognizable domain.
you probably could fix this by going into linuxconf and set the "masquerade as:" to (or whatever)

Newer linuxconfs have changed this option to "present system as"

Thing is that unless your ISP can identify the FQDN that your sendmail is using, it will not accept mail, to avaoid abuse.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.