Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Outbound mail failure from unknown recipients?

Posted on 2002-07-14
2
Medium Priority
?
252 Views
Last Modified: 2010-03-05
We recieve many outbound message failure from recipients that do not exist within our exchange organization.They are all usually being sent to yahhoo.com or aol.com.
Obviousley they are returned undeliverable because they do not exist.
Any ideas whats happening? Are we being used by external hackers?

Thanks a million in advance
Cracky141
0
Comment
Question by:cracky141
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 

Accepted Solution

by:
vpgopikrishnan earned 210 total points
ID: 7153374
In the internet mail service, select routing tab and select routing restrictions, check the host and clients that succesfully authenticate
0
 

Author Comment

by:cracky141
ID: 7153546
I have no restrictions in place.
0

Featured Post

Office 365 Training for IT Pros

Learn how to provision tenants, synchronize on-premise Active Directory, implement Single Sign-On, customize Office deployment, and protect your organization with eDiscovery and DLP policies.  Only from Platform Scholar.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

After hours on line I found a solution which pointed to the inherited Active Directory permissions . You have to give/allow permissions to the "Exchange trusted subsystem" for the user in the Active Directory...
How to deal with a specific error when using the Enable-RemoteMailbox cmdlet to create a mailbox in the cloud-based service, for an existing user in an on-premises Active Directory.
In this video we show how to create a Contact in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Recipients >> Contact ta…
The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…

715 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question