Yahoo! JAPAN Mail

Spec sheet

Free plan

YesRead 19 Sep 2026 · mail.yahoo.co.jp

Mobile apps

Official Yahoo!メール apps are available for iPhone/iPad and Android, and use requires a Yahoo! JAPAN ID login.Read 11 Oct 2026 · apps.apple.com

Support

Yahoo!メール help offers searchable articles, an AI chat agent, and contact forms that require login for personalized assistance.Read 11 Oct 2026 · support.yahoo-net.jp

Headquarters

Tokyo, JapanRead 28 Sep 2026 · mail.yahoo.co.jp

Ad-free inbox

YesRead 19 Sep 2026 · mail.yahoo.co.jp

Calendar integration

Received reservation emails can be automatically added to the calendar.Read 11 Oct 2026 · mail.yahoo.co.jp

Custom domain

NoRead 19 Sep 2026 · mail.yahoo.co.jp

Email aliases

YesRead 19 Sep 2026 · mail.yahoo.co.jp

Email service

Yahoo!メール lets users create a personal email address with a Yahoo! JAPAN ID.Read 11 Oct 2026 · mail.yahoo.co.jp

Follow-up reminders

The app can send a reminder at a chosen time for a notification or an email to read later.Read 11 Oct 2026 · mail.yahoo.co.jp

Inactivity limit

Email addresses and mailboxes unused for at least six months may be suspended.Read 11 Oct 2026 · support.yahoo-net.jp

Mailbox capacity

A mailbox starts with a 2GB limit and grows over time to at most 10GB without qualifying services; Yahoo! BB, Security Pack, or eligible LYP Premium accounts can grow without a stated limit.Read 11 Oct 2026 · support.yahoo-net.jp

Mailbox features

The service supports composing and searching email, folders, and automatic sorting.Read 11 Oct 2026 · mail.yahoo.co.jp

Mailbox storage

10Read 19 Sep 2026 · mail.yahoo.co.jp

Message limit

Each email, including its body and attachments, is limited to 25MB.Read 11 Oct 2026 · support.yahoo-net.jp

Multiple accounts

The mobile app can manage Gmail, Docomo, au, and SoftBank email accounts; Android supports Gmail only, and SoftBank support is limited to i.softbank.jp.Read 11 Oct 2026 · mail.yahoo.co.jp

Platform access

web_mobile_desktopRead 19 Sep 2026 · mail.yahoo.co.jp

Safety addresses

Users can create free secondary addresses that share the main inbox, with up to 10 normally or 30 for Yahoo! BB or Security Pack users.Read 11 Oct 2026 · mail.yahoo.co.jp

Security features

The service lists spam filtering, restrictions on overseas access, and brand icons among its security measures.Read 11 Oct 2026 · mail.yahoo.co.jp

Sender authentication

Yahoo!メール uses SPF, DKIM, and DMARC and displays icons to help users assess sender authenticity.Read 11 Oct 2026 · support.yahoo-net.jp

Plans and prices

Every Yahoo! JAPAN Mail plan and price →

Where Specifiction places it

• Personal Email Services#46 of 1158.2