Postfix allows only one recipient delimiter, but address rewriting can mimic multiple recipient delimiters; I chose to use regular expression tables in my aliases database. I’m most comfortable with Perl, so I chose to install the Perl compatible regular expression package, on Debian/Ubuntu this is done with:
sudo aptitude install postfix-pcre
Next I created a file named aliases-pcre with the following content:
Finally I updated main.conf with these lines:
alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases, pcre:/etc/postfix/aliases-pcre
Now I can enjoy e-mail addresses like firstname.lastname@example.org or email@example.com without needing to keep track of each alias. If I get spam addressed to that address, I can easily block it and complain loudly to House Depot’s customer service in India.