John W. Baxter wrote: >> I don't know if it's still true, >> but the mailer for Yahoo Groups used to immediately unsubscribe recipients if >> a single message was attempted for a failed >> primary (presumably they would try secondaries if they exist, but I don't >> know). > We learned about that Yahoo Groups habit very quickly when we first turned > up greylisting. They seem to have changed--they have been retrying > successfully for a couple of years when a new host (or subnet, usually) of > theirs starts running into greylisting. > > But that doesn't mean that no server is brain dead, only that Yahoo Groups > no longer seems to be.
I don't bother greylisting any host listed by list.dnswl.org lists. Any machine on that list should be a real mail server. Taking a quick look at a yahoogroups ip from my exim logs: [EMAIL PROTECTED]:~# host 171.168.163.66.list.dnswl.org 171.168.163.66.list.dnswl.org has address 127.0.5.0 The .0 at the end represents: - Legitimate mail server, may also send spam. The '5' is less useful but describes the host as: - Service/network providers They also provide free unregistered rsync feeds to their rbldns data: [EMAIL PROTECTED]:/etc/exim4/lists# grep yahoo list.dnswl.org.rbldnsd|head -1 66.94.225.0/24 :127.0.5.0:yahoo.com http://www.dnswl.org/search.pl?s=1376 MikeC2 -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
