passing environment variables to make regress?

[Chris Bennett]

I want to resolve this:

To run tests for Test::POP3, set the following environment variables:
TEST_POP3_HOST, TEST_POP3_USER, TEST_POP3_PASS, TEST_POP3_SMTP, and 
TEST_POP3_EMAIL.
Then run this script again.

If I go into pobj and set the variables from command line, works.
How do I set this in Makefile to work?
This will be an interactive regress.

Thanks,
Chris Bennett