SMTP Configuration

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Posted on by Ezra Nielsen

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I setup and configured email on office 365 an would like to have dynamics 365 Financials use it. I clicked the "Apply Office 365 Server Settings" and entered my office 365 User ID and password. When I test the email setup I get the error:

"The mail system returned the following error: "Mailbox unavailable. The server response was: 5.7.60 SMTP; Client does not have permissions to send as this sender"."

Is there some documentation on how to configure this?

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Financial Management

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AJAnsari 5,754 on at

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Hi Ezra,

Do your organization migration from an on-premise Exchange environment to Office 365? Ours did, and even though my mailbox has been migrated to O365, I find that I'm unable to use the O365 mail settings from SMTP Mail Setup to successfully send e-mails. I get a slightly different error than yours though (5.7.57, if I recall correctly.

I have some other O365 demo accounts and when I use one of those logins to test SMTP Mail Setup, it works like a charm.

I hope that helps.

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Ezra Nielsen 810 on at

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Hi AJ,

Do i need to setup a office365 account for D365 or do I need to configure some Exchange Server relay policies?

Thanks for your help.

Ezra

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AJAnsari 5,754 on at

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Hi Ezra,

I would look to the Exchange Server relay policies. Also, while you're at it, verify if your exchange server has a non-standard SMTP port, or if the SMTP server is different than the standard O365 SMTP server name.

I've never had to create an O365 account just for D365.

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Ezra Nielsen 810 on at

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I am still having trouble with this. It appears to be authenticating but I but will not send as DM3PR13MB0651.namprd13.prod.outlook.com

How do I configure Send As Permissions when the sender is not part of my domain in exchange?

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Chris Bulson on at

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Hello Ezra,

Are you able to sign into your Mailbox in Office 365 and send email as the user you are using? You could also check with Office 365 support to see if this is an error they are familiar with. I don't know if SMTP in Office 365 requires a certain subscription level, etc...

Thanks,

Chris

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Ezra Nielsen 810 on at

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Yes I can sign in and send and receive email fine. Is there any documentation on setting this up?

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Chris Bulson on at

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Yes, there is here - docs.microsoft.com/.../madeira-how-setup-email

I don't think this is going to help you troubleshoot why Office 365 isn't allowing you to send SMTP email. There is no setup involved, it should just work.

Thanks,

Chris

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Ezra Nielsen 810 on at

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I created a New Office user and setup email for it and it seems to be working with the new user.

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Saif Ehsan 360 on at

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Has anyone found the cause and resolution to this error? a number of customers are facing this issue; not all can create new user accounts to see if those accounts work with the email. Any ideas?

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Saif Ehsan 360 on at

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Found that this works too; but did you find the cause/resolution as to why the other account doesn't work?

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