Oops, sorry to be so long replying Andi, I've been away.
Yes, I am subscribed and I'm using the right address
I'm getting my posts returned with the following error followed by a copy of my message:-
dokuwiki@freelists.org
SMTP error from remote mail server after RCPT TO:<
dokuwiki@freelists.org>:
host turing.freelists.org [206.53.239.180]: 450 4.7.1 Client host rejected:
cannot find your hostname, [195.159.176.226]:
retry timeout exceeded