Solved

Office 365 Mail SMTP Relay Issue

Posted on 2016-11-20
3
36 Views
Last Modified: 2016-11-27
Hello
We are using the O365 mail relay connectors to send email from a third party software. All emails sent to O365 hosted email domains are sent and received ok. If we try to send to an non hosted O365 email domain it gets rejected. How can we setup the smtp reply to send externally from o365
I thought setting up smtp authentication may do the trick but I can't find where to set this up on the O365 admin console.
0
Comment
Question by:James Danahay
3 Comments
 
LVL 24

Expert Comment

by:Dr. Klahn
ID: 41895242
Can you show us the headers (detailed headers) of a rejected message, including the error message?
0
 

Author Comment

by:James Danahay
ID: 41895255
Hello

The only error we receive is in the ERP solution itself and states that the mailbox is unavailable and the server is not responding.
0
 
LVL 39

Accepted Solution

by:
Vasil Michev (MVP) earned 500 total points
ID: 41895898
There are few different ways to configure relay with O365, as detailed here: https://support.office.com/en-us/article/How-to-set-up-a-multifunction-device-or-application-to-send-email-using-Office-365-69f58e99-c550-4274-ad18-c805d654b4c4?ui=en-US&rs=en-001&ad=US

You should be using method 3, with the connector (either IP or certificate based).
0

Featured Post

Why won’t your email signature format correctly?

Struggling to get your corporate email signatures to format correctly? Does the logo keep resizing? Is the text appearing too big? What can you do to prevent this? Find out how you can save your signatures today.

Question has a verified solution.

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

If you don't know how to downgrade, my instructions below should be helpful.
Following basic email etiquette rules will help you write a professional email and achieve a good, lasting impression with your contacts.
This lesson covers basic error handling code in Microsoft Excel using VBA. This is the first lesson in a 3-part series that uses code to loop through an Excel spreadsheet in VBA and then fix errors, taking advantage of error handling code. This l…
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…

896 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

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now