Wrong alias handling

A little difficult to describe, i try:

I have a domain john.org and a domain mary.net. On domain john.org i make an alias like that:

mary@john.org forward to address info@mary.net
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Now i create an e-mail Account on domain mary.net: info@mary.net. Now i see on email-settings-> additional email address my previous alias:

mary@john.org

If i save now, an error occured, that i'm not allowed to modify domain john.org.

Any questions? Feel free to ask.

Status: 
Closed (fixed)