On May 30, 2015, at 12:58 AM, Danil Smirnov wrote:

Now I have working Postorius and I can subscribe myself to the test list and get the welcome message (with incorrect urls in it!).

Known bug! The default templates actually need to be updated to not include those urls, because the core doesn't know what those urls would be. There is machinery to allow for two levels of indirection so that, e.g. url-containing templates could be defined in Postorius, and the core would fetch the on demand, but that needs to be fleshed out a bit more (and will be in MM3.1).

But I could not post to the list or mail to the list owner from outside:

550 5.1.1 <test-owner@domain.tld>: Recipient address rejected: User unknown in virtual alias table

I've checked postfix/main.cf and everything looks right in it. Also I've ensured that var/data/*.db files are world-readable. Selinux is disabled.

How could I debug this error?

It sounds like a Postfix problem, so cranking up Postfix logging is probably going to be the most fruitful avenue.

Cheers, -Barry