In Exim I have one file per domain where the filename itself is used to determine the domain for the aliases.
For example, I'd have a file named example.org with contents like this:
This causes mail to
email@example.com to be delivered to
In Postfix the common setup is to use the file named
virtual and repeat the domain for every local part over and over again:
firstname.lastname@example.org: somelocaluser email@example.com: somelocaluser
How can I achieve my Exim-style setup in Postfix and thus avoid the repetiton?