Domain Pointer Email Alias Questions

Lets say my primary domain is www.aaa.com and I add www.bbb.com as a domain pointer.

If I send an email from code in the www.bbb.com web site, will the recipient see the sender as [email protected] or [email protected]?
Are there other limitations with the Domain Pointer Email Aliases?

 

When [email protected] sends an email from a webmail web page or Outlook, does the recipient see the email is from [email protected] or [email protected]?

 

I guess I have found answers looking at other posts. If I'm wrong, please correct me.

Question 1: Code can specify the 'from' domain.

Question 2: [email protected] can't send emails. So there are limitations with multiple domains and email.

 

Yes. Any email address set up on a pointer domain is an alias to a POP box on the primary domain. You cannot authenticate to send through the SMTP server using an alias.

On the other hand, if you send from a web application using localhost on the server, the recipient will see whatever you specify as the from address.

The issue arises when you want to relay mail through the SMTP server. To do that you need a valid email account user/pass which an alias does not have.