Set up Oauth 2.0

Recently Google and Microsoft changed their authentication method to send e-mails

With both you can either use the OAuth (method 2) authentification or the user/password (method 1), but note that the user/password and not the credentials you use to connect to your mailbox but application password that need to be created.

Gmail

Method 1: Create an application password

You can find this password generation in your account settings => Signing in to Google => App Passwords Make sure to save the password somewhere safe, after that you've created it you won't be able to see again.

Method 2: Create authorization credentials

Go to the Credentials page.
Click Create credentials > OAuth client ID.

Select the Web application application type.
Fill name field
Fill your redirect Url (Your redirect url is in your AcyMailing configuration)
Click on "create" button

Copy your Client id and your Client secret

Paste your Client id and your Client secret in your AcyMailing configuration
And then click on "please log in" button

When you click on "log in" button, you will be redirected :

Connect your Gmail account and authorize access to your mailbox
Authorize AcyMailing to use your Gmail account to send your emails

Outlook

Method 1: Create an application password

Here is the documentation to create a password: https://support.microsoft.com/en-us/account-billing/using-app-passwords-with-apps-that-don-t-support-two-step-verification-5896ed9b-4263-e681-128a-a6f2979a7944

Method 2: Create authorization credentials

Sign in to the Azure portal
Go to App registration
Click on "Registration an application" button

Fill name field
Choose the account you want to permit (more details here)
Fill your redirect url (Your redirect url is in your AcyMailing configuration)
Click on "create" button

Click on "Certificates & secrets" button
Click on "New client secret" button
Add a description (it's optional)
And click on "add" button

If you use OAuth for Bounce handling please:

Go to "API Permissions"
Click on "Add a permission"
Select "Microsoft Graph" and then search for "imap" you should be able to add the permission "IMAP.AccessAsUser.All"

Now, copy your secret id (it will not be visible afterwards)

Then, copy your client id

If you use Microsoft 365 account, please follow these steps to enable Oauth 2.0 :

go to your Microsoft 365 admin center
go to Settings > Org Settings > Modern Authentication
in the Modern authentication flyout that appears, click to enable or disable Turn on modern authentication for Outlook 2013 for Windows and later (recommended)

In your AcyMailing configuration, fill client id and client secret
Moreover please choose a tenant :
- Microsoft accounts : select this tenant, if your application accept only personal accounts
- Any account type : select this tenant, if your application accept both accounts (personal and organisations accounts)
- Organisation : select this tenant, if your application accept only organisations accounts
And then click on "please log in" button