How to Automatically Label Emails in Gmail

First, you have to set up the filter’s scope so that it only matches the emails you want to forward. Your filter will only work on whatever you specify here.

​From: lets you specify sending email addresses.

To: lets you specify receiving email addresses.​

Use the Subject field to look for something in the subject.

Has the words: looks for content in the email.

Doesn’t have: excludes emails with specific content from the search.

Size lets you search for emails of a specific size.

Check Has attachment to only look for emails with attachments.

By default, the filter applies to chat messages and emails. Check Don’t include chats to exclude chat messages.

Click Create filter at the bottom to go to the next step.