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Manage identities (email sent from alias is also sent by primary address)

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Hello everyone!

I've set up an alias for my Outlook account on Thunderbird 38.6 on Windows 10 pro. The problem is, when I use the particular alias (from drop-down menu) to send an email, the email is sent by the alias address as well as the primary address (two messages in sent folder). However recipient receives only one e-mail and that is from primary e-mail address.

Setting up "Identities" only make an alias appear in the From-drop-down-menu. It fakes that the email is being from the alias address but in real, it is not.

I did not find any helpful essay searching in the knowledge-base. I neither find anyone else reporting a similar problem.

Please let me know anything that you feel may help me fix it.. just anything.

Thank you in advance, Anup

Hello everyone! I've set up an alias for my Outlook account on Thunderbird 38.6 on Windows 10 pro. The problem is, when I use the particular alias (from drop-down menu) to send an email, the email is sent by the alias address as well as the primary address (two messages in sent folder). However recipient receives only one e-mail and that is from primary e-mail address. Setting up "Identities" only make an alias appear in the From-drop-down-menu. It fakes that the email is being from the alias address but in real, it is not. I did not find any helpful essay searching in the knowledge-base. I neither find anyone else reporting a similar problem. Please let me know anything that you feel may help me fix it.. just anything. Thank you in advance, Anup

All Replies (1)

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The alias used by Outlook is the name associated with the SMTP credential used to send the mail. The change the information in the submitted mail to match what they consider correct.

It used to work, but Microsoft have made deliberate changes to how their servers handles alias mail to make it not work. Vendor lock-in is how I see it. if your product only works on your web site you make more money. "You also kill desktop mail clients, which is something near and dear to Microsoft's heart. After all everything is in the cloud now.