Two virtual domains

[Oleksii Krykun]

I have two virtual domains, e.g. domain1 and domain2
And I have us...@domain1, us...@domain1 and us...@domain2, us...@domain2.
Now I need to receive all mail to us...@domain2 into us...@domain1 mailbox,
us...@domain2 ->us...@domain1
and
us...@domain1->us...@domain2, us...@domain1->us...@domain2.

I set up two domain aliases:
@domain1 @domain2
and
@domain2 @domain1

All works fine. But if I send message to non-existent mailbox (e.g.
us...@domain1) I receive true NDR but get following warning:

Mar 16 10:43:07 mail postfix/cleanup[28954]: warning: F41F4B82A:
unreasonable virtual_alias_maps map nesting for us...@domain1.

Is this a serious problem? How to resolve it?

Thanks,
Oleksii