Gmail places any emails that it interprets as SPAM in "Spam" folder - located
in the left navigation after you logged in. To avoid messages you do want to receive
from firstname.lastname@example.org being send straight
to spam, there's a good reason for you to whitelist our email in your Gmail account. Here's
Step 1: Log in to your Gmail account.
Step 2: If you find email from email@example.com is going to your Gmail
spam folder, open it and click "Not Spam"
Step 3: Click on the Settings cog in the top-right corner and go to Mail settings.
Step 4: Select the "Filters" tab from the choices that load, and then click on "Create a new filter" near the bottom of this area.
Step 5: In the From field, add our e-mail address firstname.lastname@example.org
you never want to land in your spam folder, type a capital OR between each address/name. It looks like this:
Step 6: Click “Create filter with this search” after you finished entering all information.
Step 7: Check the box next to "Never send it to spam".
Step 8: Click "Create Filter" tab.
That's it! If you want to create several filters to keep your emails organized by domain,
friends, family, or work, you can just repeat steps 4 to 7.