Hi, I have several domains. Each domain has an email alias, ex info@domain1.comand info@domain2.comall domainsis addedin the same mailbox. I want to send as one of the aliases, is it possible, and how do i do it?

You can not set while sending a mail and outgoing mail willhave only primary smtp address attached with it. You can see the primary email address in Email Address tab of user account with type SMTP (uppercase). If you required then you can set another email address as a primarysmtp address by clicking "Set As Primary" button.

Then I have to add a new user, or?

Hi Nikolaj, I would like to know whether you want to send as different email alias such when attempting to send email according to different situation. If I am right, I am sorry that you can only send as your primary SMTP email address. Mike

You can use a third party application to achieve that. Google for ChooseFrom. Regards, Och