Freedom251 › Personal Email Services
OCN Mail
by OCN Mail
What OCN Mail is
OCN Mail is a freemium email service for sending and receiving messages through a browser or configured mail application. Web Mail works after signing in with an OCN address and password, without installing or configuring a mail program. Each mailbox has 10 GB of capacity, and email aliases are supported. Users can search sent and received messages, create filters that sort incoming mail into folders, and forward received messages automatically. OCN provides setup instructions for iPhone, iPad, Android devices, Windows PCs, and Mac computers. The guide covers Apple Mail, Gmail, Microsoft Outlook, and Mozilla Thunderbird. Mail and address-book data can be imported and exported; address books support CSV and OCN Mail TGZ formats. Spam detection can mark subjects with [meiwaku]. A separate spam-blocking service isolates detected spam on OCN's network and costs 月額220円. Platforms listed are Android, iOS, macOS, web, and Windows. OCN is headquartered in Tokyo, Japan.
Who it suits
OCN Mail suits people wanting browser or mail-app access across desktop and mobile devices. It is also useful for users who need filtering, forwarding, aliases, and mailbox portability.
What it does well
- 10 GB mailbox capacity
- Works through web and configured mail apps
- Filters can sort incoming messages
- Supports automatic forwarding
- Import and export for mail and contacts
What to know first
- Custom domains are not supported
- Separate spam blocking costs 月額220円
- Free spam detection only marks subjects
- No mailbox price is listed
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| OCN Mail | 10 GB mailbox | On request |
| OCN Value Plan | Retains an OCN email address when using another internet provider | On request |
As ocn.ne.jp lists them, read 22 Sept 2026. The maker's own page has the final word.
Verdict
OCN Mail combines browser access, broad device setup guidance, filtering, forwarding, and data portability. The separate paid spam-blocking service and lack of custom domains may affect suitability.
Facts from OCN Mail's own pages
- Email aliases
- Yes · support.ocn.ne.jp, 22 Sept 2026
- Attachment limit
- 70 · support.ocn.ne.jp, 22 Sept 2026
- Contacts and portability
- Users can import and export mail and address book data; address book formats include CSV and OCN Mail's TGZ format. · support.ocn.ne.jp, 11 Oct 2026
- Custom domain
- No · support.ocn.ne.jp, 22 Sept 2026
- Email service
- OCN Mail lets users send and receive email through a web browser or a configured mail app. · support.ocn.ne.jp, 11 Oct 2026
- Forwarding
- Users can configure received messages to be automatically forwarded to another email address. · support.ocn.ne.jp, 11 Oct 2026
- Free plan
- Yes · support.ocn.ne.jp, 22 Sept 2026
- Headquarters
- Tokyo, Japan · ocn.ne.jp, 28 Sept 2026
- Mail apps
- The setup guide includes Apple Mail, Gmail, Microsoft Outlook, and Mozilla Thunderbird. · support.ocn.ne.jp, 11 Oct 2026
- Mailbox capacity
- The OCN mail server mailbox capacity is 10 GB. · support.ocn.ne.jp, 11 Oct 2026
- Mailbox storage
- 10 · support.ocn.ne.jp, 22 Sept 2026
- Maker
- NTT DOCOMO BUSINESS says it changed its name from NTT Communications Corporation on July 1, 2025, and lists Otemachi, Chiyoda-ku, Tokyo as its headquarters. · ntt.com, 11 Oct 2026
- Platform access
- web_and_mobile · support.ocn.ne.jp, 22 Sept 2026
- Search and organization
- Web Mail supports searching sent and received messages and creating filters that automatically sort incoming mail into folders. · support.ocn.ne.jp, 11 Oct 2026
- Security limits
- Spam blocking is a separate service, and users who have subscribed to it can configure allowed mail to avoid incorrect spam classification. · support.ocn.ne.jp, 11 Oct 2026
- Spam options
- Web Mail settings describe free spam detection that marks subject lines with [meiwaku] and a separate spam blocking service priced at 月額220円. · support.ocn.ne.jp, 11 Oct 2026
- Spam protection
- OCN's spam blocking service detects spam on OCN's mail servers and automatically isolates it on the OCN network. · support.ocn.ne.jp, 11 Oct 2026
- Support
- OCN provides mail setup instructions, troubleshooting guides, and contact information for OCN Technical Support. · support.ocn.ne.jp, 11 Oct 2026
- Supported devices
- OCN provides setup instructions for iPhone and iPad, Android devices, Windows PCs, and Mac computers. · support.ocn.ne.jp, 11 Oct 2026
- Web access
- Web Mail can be used by signing in with an OCN email address and password, without installing or configuring a mail program. · support.ocn.ne.jp, 11 Oct 2026
Where OCN Mail stands on Freedom251
- Personal Email Services#35 of 115