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When the test email is sent during the configuration of Email Notification, the software prompts the error message of "Email could not be sent" as shown below due to access for less secure apps in Gmail not enabled.


Figure 1: Email Could Not be Sent Error Message

Summary

• To turn on access for less secure apps in Gmail.

Step by step:

• To turn on access for less secure apps in Gmail:

Step 1: Open your web browser, e.g. Internet Explorer, Google Chrome, Mozilla Firefox, etc.

Step 2: Go to www.gmail.com and log into your Gmail account.

Step 3: At the top right corner of the browser, click on the account menu icon with a capital alphabet (Usually the alphabet is the first letter of your first name) as shown below.

Figure 2: Account Menu Icon

Step 3: In the menu that appears, click Google Account.
 
Figure 3: Google Account Button

Step 4: A new browser tab or window will be opened as shown below. Click on Sign-In & Security to continue.

Figure 4: Sign-In & Security Icon

Step 5: Under Sign-In & Security page, go to the left panel and click Apps with account access.

Figure 5: Apps with Account Access Setting in Left Panel Menu

Step 6: Scroll down and look for the setting of Allow less secure apps option on the right and turn it ON. This change will take effect immediately.

Figure 6: Allow Less Secure Apps Option in Sign-In & Security Window