Best way to use trigger to email a report ?

psql (9.6.0, server 11.3) on linux

Looking for ideas. I want a trigger to...
1) compose an html report based on DB content
2) email the report to a dist list (dl = value of a table column)

If this will involve hybrid coding, I prefer PL/perl. The linux env has
both "mail" and "mutt" (if this is of any help).

The idea is to send a report to the list when all the data has been
collected for a particular job and the final status of the job is updated
as a col of a rec of a certain table. Probably a post update trigger.

Thanks for any ideas :-)