I have about 10 email address set up in Outlook, 5 of them work fine but I have only just realised that the other 5 are sending through the primary email address, see example below
firstname.lastname@example.org - Primary Email
email@example.com - When sending through this account in Outlook I receive my test email from firstname.lastname@example.org and the originater also says sent from email@example.com . But above in grey it says this email will be sent through firstname.lastname@example.org
I can't understand what is going on, my other account all send through their own email addresses. Any ideas anyone?