On Thu, 26 May, 18:29 ET, Kenneth Blackwell <[log in to unmask]> : > On my list I got a subscriber yesterday whose address is: > > [log in to unmask] > > and whose name is > > Carleton Distribution > > Now "russell-l" happens :-) to be the name of my list, and "carleton" the > name of an Ottawa university. Can anyone tell me what kind of fish I've > caught, and more important how it's likely to behave in terms of posting > to the list? > Fingering the address produces an unknown host. Correct. The hostname 'CUNEWS.CARLETON.CA' has *no* 'TYPE=A' record in the Internet name-server database, i.e., it is not "directly-connected" to the Internet. Note that the 'TYPE=MX' record in the database points to the host 'BERTRAND.CCS.CARLETON.CA', and a check on that host reveals: VRFY RUSSELL-L 250 <"|/usr/local2/shared/news-filter culist.russell-l"> i.e., an E-mail-to-news transformation-filter. I think that you've located a helpful and considerate person at Carleton, who wishes to make your mailing-list available via their "news" system.