Forum Discussion
Sending email as alias in office365?
I used to have my domain email hosted in office 365. The reason i switched was because of a lack of a feature i really needed. You had the ability to create multiple aliases in office 365 so you coul...
Hmm, my tests show that doesn't work with BCC. What exact SMTP header contains the BCC address ?
When looking at the header information you can see that To: is blank meaning it was BCCed
Above that you can see it was sent to my test proxy alias mailto:anthony@atlassaferooms.com
- Great! I've just sent you a message with Subject "6 -Aug-2021 test 1".
- I am open to test if you want to sent to anthony@atlassaferooms.com from your yahoo account.
- afabozzi-20
This way is not reliable. Sometimes (very often) you just unable to retrieve the BCC address from the email headers. See this thread: https://stackoverflow.com/questions/36306660/test-received-email-header-in-sieve
A quote:
"There is no guarantee that the Received: headers will contain the destination address, either; the only place this information is unambiguously exposed is in the SMTP envelope, which is typically discarded."
As a proof, you can try to send a message using BCC from any yahoo account to your Office 365 alias address. I'm sure you will be unable to get the BCC address from the email headers.