Can't select my different email alias

Can't select my different email alias

Hi,

I had created one main email for my account (admin.mysite) and 2 email alias (info.mysite and sales.mysite) but now I have noticed I can only send email from info.mysite and I cannot choose the other emails.

I changed nothing in my account and when I check on my control panel, the email alias are still there.

Thanks for your help