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
943 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

Comparison of Amazon Drive, Google Drive, OneDrive

What is Best for Backup: Amazon Drive, Google Drive or MS OneDrive? In this free whitepaper we look at their performance, pricing, and platform availability to help you decide which cloud drive is right for your situation. Download and read the results of our testing for free!

Question has a verified solution.

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

Background Information Recently I have fixed file server permission issues for one of my client. The client has 1800 users and one Windows Server 2008 R2 domain joined file server with 12 TB of data, 250+ shared folders and the folder structure i…
Check out this step-by-step guide for using the newly updated Experts Exchange mobile app—released on May 30.
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…
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…

726 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