Good Day ...

1. I had one OE email address account, my default
2. I created a 2nd OE email address account
3. When I send an email from my 'default account' to my '2nd account' the
message is not delivered and, this message is generated ...
' reason: 550 5.1.1 unknown or illegal alias: '

What am I doing wrong?

Thank you for your time & consideration.
Jim