outlook 2016, email delivery

i am getting this error while sending to particular email address
The following addresses had permanent fatal errors ----- <.com>
    (reason: 550 permanent failure for one or more recipients (:blocked))

   ----- Transcript of session follows ----- ... while talking to d132923a.ess.barracudanetworks.com.:
>>> DATA

is this the receipient server blocking or barracuda?
pramod1Asked:
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.

Edward van BiljonMessaging and Collaboration Technical Lead (Exchange MVP)Commented:
Hi

Sounds like a blacklisting issue. Can you verify if your domain is listed? You can go to mxtoolbox.com and see if your ip or ip's are listed and if so then request delisting but you will need to clean up and ensure you not on an open relay. Ensure you have spf, dmarc and your dkim records in place
1
Saif ShaikhServer engineer Commented:
It's barracuda. When you are sending to a remote domain the remote domain has barracuda as spam filter and it is blocking your email.

Contact the remote domains administrator and inform them to whitelist your domain in barracuda spam filter.
0

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
Exchange

From novice to tech pro — start learning today.