Yahoo! is an global technology company based in Sunnyvale, California. It is known across the world for its web portal, search engine, Yahoo! Mail, Yahoo! News, Yahoo! Finance, and Yahoo! Groups. Yahoo! Mail has approximately 300 million email subscribers.
Yahoo! was acquired by Verizon (July, 2016). Verizon also acquired AOL in May, 2015.
Note: Starting February 1, 2018, Oath (A Verizon company that owns both AOL and Yahoo!) began consolidating sending infrastructures between AOL and Yahoo!. This means that the AOL domains will continue to operate and accept email, but Yahoo! will handle spam filtering and processing.
You can get additional information about the changes and the impact here:
Geocities.com, kimo.com, maktoob.com, oddpost.com, yahoo.at, yahoo.be, yahoo.bg, yahoo.ca, yahoo.cl, yahoo.co.hu, yahoo.co.id, yahoo.co.il, yahoo.co.in, yahoo.co.kr, yahoo.co.nz, yahoo.co.th, yahoo.co.uk, yahoo.co.za, yahoo.com, yahoo.com.ar, yahoo.com.au, yahoo.com.br, yahoo.com.cn, yahoo.com.co, yahoo.com.hk, yahoo.com.hr, yahoo.com.mx, yahoo.com.my, yahoo.com.pe, yahoo.com.ph, yahoo.com.sg, yahoo.com.tr, yahoo.com.tw, yahoo.com.ua, yahoo.com.ve, yahoo.com.vn, yahoo.cz, yahoo.de, yahoo.dk, yahoo.ee, yahoo.es, yahoo.fi, yahoo.fr, yahoo.gr, yahoo.hr, yahoo.hu, yahoo.ie, yahoo.in, Yahoo.it, yahoo.lv, yahoo.nl, yahoo.no, Yahoo.pl, yahoo.pt, yahoo.ro, yhoo.rs, yahoo.se, Yahoo.si, yahoo.sk, yahoogroups.co.kr, yahoogroups.com.cn, yahoogroups.com.sg, yahoogroups.com.tw, yahoogrupper.dk, Yahoogruppi.it, yahoomail.com, ymail.com, y7mail.com
|Connection / throughput||
Simultaneous main transfer agent (MTA) connections: 150
Throughput: 20 messages per connection
|Complaint Feedback Loop (CFL) application||The Yahoo! CFL program helps senders minimize complaint rates. Note: Yahoo! attempts to send every complaint, however, it reserves the right not to send all complaints from the FBL.
|List-Unsubscribe header||Yahoo! supports the use of the List-Unsubscribe header and have used it in the past to unsubscribe inactive accounts.|
Return Path partnership with Yahoo!
In partnership with Return Path, Yahoo! uses the Return Path Certification whitelist for preferential treatment. Yahoo! sends Return Path volume and complaint data for Certified senders only.
Yahoo!'s data feed covers all Yahoo and partner domains as follows:
|AT&T||Ameritech.net, att.net, bellsouth.net, flash.net, nvbell.net, pacbell.net, prodigy.net, sbcglobal.net, snet.net, swbell.net, wans.net, worldnet.att.net|
|BT||Btinternet.co.uk, btopenworld.com, mybtinternet.com, talk21.com|
|Spark New Zealand Trading Limited||Spark (Xtra) no longer uses Yahoo! email as of April, 2017|
|Yahoo, Inc.||Geocities.com, kimo.com, maktoob.com, oddpost.com, yahoo.ca, yahoo.cl, yahoo.co.id, yahoo.co.in, yahoo.co.kr, yahoo.co.nz, yahoo.co.th, yahoo.co.uk, yahoo.com, yahoo.com.ar, yahoo.com.au, yahoo.com.br, yahoo.com.cn, yahoo.com.co, yahoo.com.hk, yahoo.com.mx, yahoo.com.my, yahoo.com.pe, yahoo.com.ph, yahoo.com.sg, yahoo.com.tr, yahoo.com.tw, yahoo.com.ve, yahoo.com.vn, yahoo.de, yahoo.dk, yahoo.es, yahoo.fr, yahoo.gr, yahoo.ie, yahoo.in, yahoo.it, yahoo.no, yahoo.pl, yahoo.ro, yahoo.se, yahoomail.com, ymail.com, y7mail.com|
Yahoo! delivery mediation
Yahoo! provides a link for the public escalation of issues.
Yahoo! has divisions globally, with client support to handle issues in those regions. You should escalate delivery issues about Yahoo! domains in the local region.
- Review their feedback loop to ensure that complaints are being processed.
- Review their Simple Mail Transfer Protocol (SMTP) logs or bounce messages.
Return Path guidance
Return Path understands Yahoo's anti-spam system quite well. We are extremely limited in what we can mediate, but we can share data to help senders understand their delivery issues.