Hooray for recipient delimiters (geek alert)
I’ve spent the last day integrating the amavisnewsql plugin with Squirrelmail and figuring out how to use my custom and separate alias maps and virtual alias maps in postfix. The workaround came by putting the alias map hash in the virtual_alias_maps list. This treated all of my local alases like virtual aliases and caused Postfix to rewrite them so that the amavis-new SQL lookup would match my custom SpamAssassin level settings to me and not ignore the email that was previously addressed to my alias and, amavis thought, to someone else.