Error message on Outlook and Lost Emails

[Heidi22221]

I just downloaded Outlook on my computer and I cannot find all the emails I
had with Windows Mail. It's like it erased them all. How do I get that back?

Also, I am recieving this error message when I send emails: System
Undeliverable: 553 Sorry, that domain isn't in my list of allowed rcpthosts.

 

[DL]

Depends whether during the installation & configeration of Outlook you
received a prompt to import your mail from Mail.
What version of Outlook have you installed?