1. I get this issue when I try setting up YaySMTP with my Outlook Microsoft mailer.

Mailer: Outlook Microsoft
[404]: The mailbox is either inactive, soft-deleted, or is hosted on-premise.

This issue was caused by using an Azure AD user with no valid M365 license assigned. You are getting this error because no Exchange Online mailbox is available to use for the azure ad user who does not have a valid M365 license. This ll only be available/created for users with a valid M365 license

  1. When I send test email I get this error notification. How can I fix it?

Class 'SimpleXMLElement' not found

The only thing you need to do is just installing the php-xml package to solve it.

  1. What should I do when I get this error after sending test email?

cURL error 35: OpenSSL SSL_connect: Connection reset by peer

Usually, this error message denotes the SSL connection error and often happens due to an outdated cURL package or SSL protocol in your server. There can also be a firewall on your server. Please contact your web host provider for more details on that. 4. I'm trying to configure Amazon SES with an account in sandbox mode but I can't make it work. What is the issue?

Please note that you only can send emails from Verified email addresses. Please don't forget to click verifying your email account to complete your settings.

  1. I connect with the Microsoft Outlook SMTP server to YaySMTP and noticed this error message as below:

Your Client ID or Client Secret are not correct.

You should double-check if you copy and pasted the API key and Client ID correctly. Copy the Application (client) ID (as in the image below) and pasted it into the Client ID field of YaySMTP settings on your website carefully.

After creating a client secret, you will see a Client secrets item. Copy its value and pasted into API Key field.

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