On: Tim Berners-Lee: Cool URIs don't change (1998)

[lsc]

URL shorteners are already starting to be seen by the anti-spam community as being a little bit like open SMTP relays.

Several of my customers have been listed on the SBL because they ran unauthenticated URL shorteners, and of course, those shorteners were used to get around anti-spam URL blacklists.

[soult → lsc]

Do you mean that their server IPs got blacklisted? Or did the URL shortener domain just get added to a URL blacklist?

[lsc → soult]

Both, if I remember correctly.