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Configuring Microsoft 365 for Outgoing Email

Email Updated 6 December 2024 4 min read
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Recycly allows you to configure your system to send emails via your Microsoft 365 account, so that you can send Quotes and Invoices directly from your Recycly system.

1. Configure the Outgoing Email Server

To configure your system to send emails via Microsoft 365, first go to Settings -> Outgoing Email Servers 


You will see the default Recycly email server. This is used for sending things like password resets so you should not remove this.


Click the New button to create a new Outgoing Server, with the details as below:


The username should be a Microsoft account with permission to send as any email address that you wish to use as a "From" address in Recycly

Now click the "Connect your Outlook account" button. This will take you to the Microsoft App Authorisation screen.


Our Microsoft app is currently Unverified (however we have submitted it to be verified and hope to be verified shortly!).

Press Accept to allow Recycly to send emails on your behalf.

Once the authorisation is successful, you should see the small green message shown below


2. Test your new Outgoing Email Server

First we need to check that your email address is set correctly on your user account.

Click your username in the top-right of Recycly and select the My Profile option.


Please check that the Work Email and Email fields are set to either a) the same email address you entered in Step 1 above, or b) an email address that the user is allowed to send as.


One you've double-checked the email address in your user profile, you are ready to test your outgoing email server.

Return to the Microsoft 365 Outgoing Email Server you created in Step 1 above, and click the Test Connection button.


If all is well, you should receive the Connection Test Successful message in the top-right of the system.


Troubleshooting


This section details the causes and resolutions for some common issues with setting up Microsoft 365 Email Integration.

Error: SMTPSenderRefused: Authentication unsuccessful, SmtpClientAuthentication is disabled for the Tenant

Full Error: 

5.7.57 Client not authenticated to send mail. Error: 535 5.7.139 Authentication unsuccessful, SmtpClientAuthentication is disabled for the Tenant. Visit https://aka.ms/smtp_auth_disabled for more information. [DU2PR04CA0037.eurprd04.prod.outlook.com 2023-12-19T13:13:10.269Z 08DBFF48A23204CA]

user@domain.com

Resolution

This error occurs when "Authenticated SMTP" is disabled for the Microsoft 365 user in Microsoft 365 Admin Cent (opens in a new tab)er

To resolve the problem, click the link above to open the MS 365 Admin Center, then click the user that you are using to send emails through recycly


Click the Mail tab on the user details popup, then click the Manage email apps link.


On the popup that appears, make sure the Authenticate SMTP option is selected, then press the Save Changes button.

This should resolve the "SmtpClientAuthentication is disabled for the Tenant" error.

Error: SMTPDataError: SendAsDenied; user1@domain.com not allowed to send as user2@domain.com

Full Error: 

5.2.252 SendAsDenied; user1@domain.com not allowed to send as user2@domain.com;
STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception

Resolution

This error occurs when the email account used to connect to Microsoft 365 from Recycly does not have permission to send as the email address mentioned in the error.

  • Go to the Microsoft 365 Admin Cent (opens in a new tab)er and click on the User or Group that you want to send AS, e.g. if you need to send as sales@mydomain.com, click on that group to open the Details pop up

  • Click the Mail tab, then click the Send as permissions link


The next screen shows which users currently have access to send as this account


If the user that you authenticated with Recycly is not in the list, you can add them via the Add permissions button

IMPORTANT: The Microsoft 365 "Send as permissions" setting can take a few minutes to apply, so don't worry if you are still receiving the SendAsDenied error immediately after changing this setting.

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Still stuck? Contact the Recycly support team