Acronis Cyber Protect Home Office, Acronis True Image: E-mail Notifications to Gmail Fail with "Authentication failed"

Symptoms

You set up e-mail notifications to Gmail.
Sending e-mail notifications fails with:
Authentication failed

Solution

From May 30, 2022, Google no longer supports the use of third-party apps or devices which ask you to sign in to your Google Account using only your username and password. As a result, the option Less secure apps doesn’t exist anymore, and the configuration procedure was completely changed.

To use a Gmail account as email service, do the following:

click to expand

1. In the settings of your Gmail account, go to Security ---> App passwords:

Pay attention: 2-Step Verification should be activated.

2. Under "Select the app and device for which you want to generate the app password" choose: Select app -> Other (Custom name), type Acronis and click on Generate.

3. The password will be generated:

Copy it down somewhere as you only get to see it once. If you lose this password you’ll need to generate a new one!
In the program settings specify in this order:
1. SMTP server: smtp.gmail.com
2. Encryption: TLS
3. Port: 587
It is important to select the encryption type first, and then specify the port.
In the SMTP authentication section specify your Gmail e-mail address and the generated password in step 1