Microsoft now allows you to create custom (or disposable) email addresses based off your standard email address with Plus Addressing. This enables you to better target and manage incoming emails with mailbox rules.
Add a unique “tag” to your email address to determine who shares your email address and to add more options for rules.
For example, Kim Akers could use a plus address for email@example.com and set something like firstname.lastname@example.org that could be used to sign up for the newsletter at the Northwind web site. Then when Northwind sends a newsletter to email@example.com it will route directly to firstname.lastname@example.org. Kim could create an Inbox rule that then moves messages sent to this + address into the "Northwind" folder.
From this scenario, we can see Plus addressing support in Office 365 is a good way to simply manage your Inbox, and even track potentially unwanted email from marketing and sales campaigns.
Plus addressing is available to all University staff and students.
You don’t need to do anything with your Microsoft account to start using this feature. Simply add a “+tag” after your username (can be first.last, alias) and before the “@” sign and emails will arrive in your inbox with the unique address.
You could then create an Inbox rule that then moves messages sent to this + address into a "Plustesting" folder.