You can explore and test an unreleased feature in Public Preview, but. Note: Currently, sending from aliases is in Microsoft’s Public Preview mode. Your messages will show your alias address as the sender and disguise your primary email address.
Send emails using an alias in Outlook on the web. Since it feels like a lot of email blasts from large companies come from a “noreply” alias, we were surprised to see that it wasn’t as commonly registered. Send email from an alias with Outlook on the web. No matter how many dots you use or where you put them, Gmail will still deliver those.
You can add dots between words, letters, or numbers to create email aliases. Gmail will ignore any dots added before the sign and treat it just the same as your original email address.