If you looking for Icarus Verilog, you're close. You're at the right domain, go here: http://iverilog.icarus.com.
If you are looking for Stephen Williams in particular, go here: http://stevewilliams.icarus.com.
If you are looking for Stephen Williams' astronomy blog, go here: http://steveastronomy.blogspot.com.
The home page for my employer is http://www.picturel.com. We do nifty image processing boards and chips.
For math tutoring, go here: http://www.propermath.com.
Spam delivered to Icarus.com gets reported to spamcop.net, and
this domain uses the blacklist from spamcop and other sources to
aggressively filter spam. Such black lists are normally used to tag
potential spam to be set aside and checked for spamminess later, but
this domain gets way to much of it to do anything other the block it
outright. See http://www.spamcop.net
for information about spamcop.
Icarus.com also uses other black lists to filter spam. Due to huge volumes of spam from China and Korea, and the large number of open proxies, relays, or otherwise poorly configured systems in those regions, mail traffic from them may be blocked outright.
Other IP ranges are collected ad hoc to form a sendmail format access list for rejecting known or likely sources of spam. This list is collected (and edited) by hand. If your IP is on this list, then try to contact someone at icarus.com to arrange for its removal. The list, as it stands currently, is here: <ftp://ftp.icarus.com/pub/access.spam>