- Edited
The help message says that it is generally used when sending mail from aliases of this mail box.I do not understand this immediately. I have an email called primary@example.com which has alias1@example.com, alias2@example.comDo I add the 3 emails as separate emails in Admin Panel -> Emails with the alias in Email Address field and primary@example.com in Username?Or should I just add a single email with Email Address and Username as primary@example.com and check "Allow Header Spoofing"?If so, where do I specify the aliases to be used?