Sendmail appending Domain name to outgoing E-mails

This is taken from the header when it is sent to my Outlook account.


Also the only reason I was able to find this out was I finally added to my SMTP address within AD users and computers on the Windows Domain account which enabled the E-mail to get through.

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.

ITHCIAuthor Commented:
Also I forgot to mention that I use the following command to send the mail.

 mail -R

and then I will get a response or respond to as the follows.



ITHCIAuthor Commented:
Another instance of when I use mail and the -r switch to send on behalf of someone, Here I sent on behalf of; on behalf of;
cjl7freelance for hireCommented:

You need "MASQUERADE_AS(`host.domain')" and  FEATURE(`masquerade_envelope')

Have a look at


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
ITHCIAuthor Commented:
Thanks alot
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.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.