New answers tagged email-forwarding
Short answer The email messages headers could be modified in each "step" of its route, some servers just add a timestamp to help trace the email but the keyword could vary so reading email headers is complex. There are online tools to help users to read email headers. To find tools like these you could use Google to search for [email headers online tools] ...
Try "editing info" of the Outlook email address in you Gmail settings. If there's a checkbox "Treat as an alias," check it.And, if you've added you Outlook email address to your Gmail one in the past 30 days, it will be forwarded. (There's always 30 days of forwarding)
You can check your Outlook.com mailbox settings. You can choose to Don't Forward . This setting will not forward your emails to any address. If you want to send incoming emails to other address (you can specify list of addresses), choose Forward your mail to another email account option. For your concern, you should choose option 1.
This question has been answered here, but I'm unable to close it because of the bounty. In short, you may use Gmail's SMTP server for your alias address, as long as you have enabled two-factor authentication.
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