GOOGLE

ADDIGNORE content :hostmask
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This functionality allows to add Ignore-Entries.
These can be dependent from the Hostmask and/or from Content.
Content is meant as a part of any private Message and/or Notice.
If a special Hostmask with any content has to be filtered,
you would use for example:
/ADDIGNORE * :*!*@*.lao.com
Has a content to be filtered only, you will have to use
for example:
/ADDIGNORE sex :*!*@*
That would filter everything, which has the part of text
"sex" in the message-Content.
If both content and hostmask have to count, you could use:
/ADDIGNORE hug :*!*@*.icafe.com
for example. 
This would deny all Messages from the domain icafe.com with the
content "hug".
See also: DELIGNORE LISTIGNORES