To set up a filter for your tweaked email addresses, click the cog icon on the top right, followed by View all Outlook settings. Under the Email tab, click Rules > Add new rule. Name your potential filter, select To and your email alias as the condition, and then decide on the action to take. For instance, you might tell Outlook to immediately delete alias-addressed messages, move or copy them to certain folders, delete them, mark them as read, label them as spam, categorize them, forward them to another email address, and so on. Click Add another action to process the incoming message in multiple ways, or Add an exception to exclude certain messages from the filter. When you're happy with the actions that an alias-addressed email will receive, click Save.