Update: adding 220.127.116.11/24
- An update for the y!groups mailer list June 15, 2008
The block 18.104.22.168 is actually used as a /23, so the block
22.214.171.124/24 is also included.
current complete list as of June 15, 2008:
Adding these addresses to your whitelist helps ensure that client
email is not blocked due to false positives from filters.
For more information about how to read these address ranges,
In short, an address block like 126.96.36.199/24 means
all the addresses from 188.8.131.52 through 184.108.40.206
should be allowed to send mail as these are Yahoo! Groups
outbound mail servers.
The entire range of IPs are not used by mailers, but the entire range
are Yahoo! servers. Our outgoing mailers run custom software and do
not handle incoming mail or listen on port 25. For incoming mail,
please see the MX records for yahoogroups.com and