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Karamvir Singh
Written by Karamvir Singh

Email Authentication Code Not Delivered

This help doc explains how to fix hotmail email delivery issue.

Please add following domian names to safe sender list:


For Windows Live Hotmail email addresses, Outlook Mail, which is how you access your Hotmail email, does a decent job at filtering spam emails into the spam folder. However, it might also assume that normal, nonspam emails are junk and send those into the spam folder too. Even worse, at times they just block certain domains altogether even if they are DKIM verifiied.

If Hotmail emails are being sent into the spam folder when you don't want them to, or you want to be sure that future emails are never marked as spam, you can add specific domains to the Safe senders list. That way, Hotmail will never regard mail from that sender as spam.

To add to safe senders list -

Click the settings gear icon at the top right of

Click View all Outlook settings at the bottom of the pop-out menu.

Go to Mail > Junk email.

Type domain names from the above list into the text box in the Safe senders area.

Click Add.

Click Save at the top of the page.