I'm trying to setup mailing of emerge logs, but it's failing for
reasons I don't grasp.

In /etc/make.conf I have the following:

PORTAGE_ELOG_MAILURI="userid@mydomain.com"

Running emerge, for example "emerge -1 uptimed" give the following
message:

!!! A network error occured while trying to send logmail:
[Errno 111] Connection refused
Sure you configured PORTAGE_ELOG_MAILURI correctly?

As a test, from a bash command line I have run:

echo "testing userid@mydomain.com" |
mail -s"testing userid@mydomain.com" userid@mydomain.com

The command line test works fine which indicates that the value of
PORTAGE_ELOG_MAILURI is correct. However emerge is giving the message
shown above.

Any thoughts on what I've done wrong?

Regards,

David