update: adding 188.8.131.52/24
- An update for the y!groups mailer list November 25, 2008
We have increased capacity and added a new netblock.
Please whitelist 184.108.40.206/24 in addition to the other blocks
already listed below.
current complete list as of Noember 25, 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 220.127.116.11/24 means
all the addresses from 18.104.22.168 through 22.214.171.124
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