?
Solved

External mail clients (Postbox 3.0.9) can not send email 550 5.7.1 Client does not have permissions to send as this sender

Posted on 2014-02-20
4
Medium Priority
?
957 Views
Last Modified: 2014-02-28
Hi There,

Exchange 2010 environment.

External users can't not send email using Postbox (mac client)

Internal users are not affected just external users.
This was working perfectly fine in the past.

The error is: 550 5.7.1 Client does not have permissions to send as this sender

The same external users can send emails using Smartphone (Iphones) but not via email client.

Thanks, Rod
0
Comment
Question by:Rodrigo Carrilho
[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
4 Comments
 
LVL 14

Expert Comment

by:Andy M
ID: 39873222
Hello

What connection method is the Postbox software using to connect to the Exchange server? POP/SMTP, IMAP, EWS, OWA?

iPhones and Email clients connect in different ways to the exchange server. The phones use Activesync where as the email clients use one of the above connection methods. The fact that the phone works indicates the account is working with regars to sending/recieving email so the issue will be with the connection methdo used by the Mac client.
0
 
LVL 37

Expert Comment

by:Jamie McKillop
ID: 39873543
Hello,

Make sure the client is set to authenticate before sending.

-JJ
0
 

Accepted Solution

by:
Rodrigo Carrilho earned 0 total points
ID: 39881233
thank you for the comments.

I managed to solve the problem by giving full permission the mailbox user itself.
0
 

Author Closing Comment

by:Rodrigo Carrilho
ID: 39894355
I managed to solve the problem by giving full permission the mailbox user itself.
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

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

Check out this step-by-step guide for using the newly updated Experts Exchange mobile app—released on May 30.
Sometimes clients can lose connectivity with the Lotus Notes Domino Server, but there's not always an obvious answer as to why it happens.   Read this article to follow one of the first experiences I had with Lotus Notes on a client's machine, my…
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…
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…
Suggested Courses

771 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