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

x
?
Solved

Pleeeease help! - Why does a user get this error message "550 sorry, mail to that recipient is not accepted (#5.7.1)" when trying to send email from their non-Exchange address?

Posted on 2008-10-28
1
Medium Priority
?
3,188 Views
Last Modified: 2013-11-30
This is a Windows Server 2003 SP2 environment with an Exchange Server 2003 SP2 member server. There are about 12 users connected to the LAN using Outlook 2003 and 2007. They can all send and receive email just fine through their Exchange accounts.

One user, Mel, also has a POP/SMTP email address configured in Outlook 2007.   Up to a couple weeks ago Mel could send email from this additional account. Then we had a glitch where an Exchange mailbox was deleted after an employee quit but their AD user account still existed, then a non-delivery report was sent to a group that included that user, but their mailbox did not exist, which created another non-delivery report, which was also sent to the group including that user, which created a vicious cycle resulting in ~45,000 non-delivery report emails ending up in the mailboxes of several users, including Mel's.

As a part of the fix for this problem, I disallowed delivery reports and NDR's in the properties of the Default Internet Message Format in Exchange System Manager. I have since deleted both the user and the mailbox that caused the initial problem, and turned back on delivery reports and NDR's.

Anyway, now when Mel tries to reply to or send a new message via the external SMTP server configured in Outlook, she immediately gets an email in her inbox like this:

"Your message did not reach some or all of the intended recipients.

      Subject:      RE: Order Received!
      Sent:      10/28/2008 12:01 PM

The following recipient(s) cannot be reached:

      recipient@emailaddress.com on 10/28/2008 12:01 PM
            550 sorry, mail to that recipient is not accepted (#5.7.1)"

(I have changed the real email address to recipient@emailaddress.com).
I'm pretty sure this is coming from the Exchange Server, not the SMTP server. I have double-checked all the SMTP server settings and they are all correct.  When I test the account settings in Outlook 2007 both tests pass with green checkmarks. I've also tried deleting the POP/SMTP account, restarting Outlook, and recreating the account from scratch. Same problem.  I also tried creating a brand new POP/SMTP email account using a different, known good server, that works fine on my computer on a different network.

The MX records and DNS settings for this domain are correctly set up, as is port forwarding to the Exchange server. All outbound connectivity is allowed by the firewall on all ports.  Mel could send email just fine via this alternate address before the previously mentioned problem with mass NDRs occurred. In the rush to fix that problem I might have changed some setting that caused this new problem, but I have looked everywhere through my Exchange settings and can't find what that setting might be.
0
Comment
Question by:fnillc
[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
1 Comment
 

Accepted Solution

by:
fnillc earned 0 total points
ID: 22934010
Well I didn't figure it out, but it started working all of the sudden, for no apparent reason. I just had to wait a couple weeks.
0

Featured Post

Get free NFR key for Veeam Availability Suite 9.5

Veeam is happy to provide a free NFR license (1 year, 2 sockets) to all certified IT Pros. The license allows for the non-production use of Veeam Availability Suite v9.5 in your home lab, without any feature limitations. It works for both VMware and Hyper-V environments

Question has a verified solution.

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

This article will help to fix the below error for MS Exchange server 2010 I. Out Of office not working II. Certificate error "name on the security certificate is invalid or does not match the name of the site" III. Make Internal URLs and External…
We aren’t perfect, just like everyone else.  Check out the email errors our community caught and learn the top errors every email marketer should avoid.
In this video we show how to create an email address policy 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 Mail Flow…
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…

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