Suddenly unsubscribed

I just received this:

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You have been removed from mailing list FTGZG-L@bolton.ac.uk.

To resubscribe, send a mail message to:

    Internet:	FTGZG-L-Request@bolton.ac.uk
    BITNET:	LISTSERV@bitnetnodename

The message should contain exactly one line, containing the command:

    SUBSCRIBE FTGZG-L

You may omit the list name if you are using the Internet -Request
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(This message was generated automatically.)

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Is there some automatic feature that removes people from the list for
some
reason? I didn't send an unsubscribe message, but I haven't been
contributing recently either (not much to say at the moment, hell). 

Can someone help out?

JS

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Jeremy M. Sadler
sadlerj@ocean.com.au
http://www.ozemail.com.au/~jsadler