[ILUG] Postfix error (I think?)

[Jason Corcoran.]

Just tried to email ILUG there and got the following in my maillog

Jul 15 11:55:01 web postfix/smtp[18402]: 943FBBD05: to=<ilug at linux.ie>, 
relay=dagda.tuatha.org[193.1.31.98], delay=1, status=deferred (host 
dagda.tuatha.org[193.1.31.98] said: 450 <ilug at linux.ie>: Recipient address 
rejected: GL90 (in reply to RCPT TO command))


I am using Fedora core 3 with postfix emailing using mutt  is this a problem 
on my side or ILUG's

Jason.
-- 
Jason Corcoran.

Similarity Systems.             jason.corcoran at similaritysystems.com
Wilson House, Fenian Street,    + 353 (0)1 4004900.
Dublin 2, Ireland.              http://www.similaritysystems.com

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