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OCN Mail

Freemium#51 of 115 in Personal Email Services

OCN Mail: A practical OCN email service for webmail, mail clients, and large attachments. Ranked #51 of 115 in Personal Email Services by our editors (6.0/10); pricing: Free plan; best for simple webmail with large attachments.

6.0/10Editor score

Visit OCN Mail

OCN Mail6.0 Visit OCN Mail

At a glance

Editor score
6.0 / 10
Pricing
Free plan
Best for
Simple webmail with large attachments
Free plan
Yes
Mailbox storage
10 GB
Facts checked
22 Sep 2026

Where it wins
- 10 GB mailbox with unlimited message retention
- Messages up to 100 MB, with approximately 70 MB for attachments
- IMAP, POP, forwarding, filters, and DMARC-based protection
Where it doesn't
- Requires an eligible OCN plan
- Integrations are limited to standard mail protocols and OCN App
- No custom-domain support

Our verdict on OCN Mail

OCN Mail is a personal email service for people using eligible OCN internet or mobile plans. It combines browser-based webmail with access through standard IMAP and POP mail clients, supporting computers, smartphones, and tablets. The service includes one basic OCN email address with eligible plans, a 10 GB mailbox, unlimited retention, an address book, mail filters, automatic forwarding, spam classification, and DMARC-based impersonation protection. It is suited to solo users and small-scale personal email needs rather than organizations seeking a standalone mailbox service.

The published plans show two relevant paths. OCN Mail provides the mailbox and email address with eligible OCN plans. OCN Value Plan lets users retain an OCN email address while using another internet provider. That structure makes the service most appropriate for users already within the OCN ecosystem or those who want to keep an existing OCN address after changing connectivity providers. It is less suitable for someone looking for an independent email account unrelated to an OCN plan.

Platform access covers web, iOS, Android, and API, while the listed integrations are IMAP, POP, SMTP, and OCN App. Its strongest practical feature is attachment capacity: webmail messages can be up to 100 MB, with approximately 70 MB available for attachments. Standard filtering, forwarding, and spam controls cover common inbox-management needs. Choose OCN Mail for straightforward webmail with mail-client compatibility, durable message retention, and larger attachments. Users who need custom domains, a broader integration ecosystem, or an email service without OCN plan requirements should consider an alternative.

Your product? Our editors can test OCN Mail in depth and publish a review, labelled as paid · from $149/mo →

OCN Mail pricing

Plans Free planFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 22 Sep 2026.

See plans on ocn.ne.jp

All 2 OCN Mail plans and prices →

OCN Mail fact sheet

Free plan	Yes
Paid from	Not verified
Mailbox storage	10 GB
Attachment limit	70 MB
Custom domain	No
Email aliases	Yes
Ad-free inbox	Not verified
Platform access	Web_and_mobile
Deployment	Cloud, Mobile
Platforms	Web, iOS, Android
Support	Docs
Built for	Solo, Small business (editorial estimate)
Integrations	4 integrations: IMAP, POP, SMTP, OCN App
Pricing	Free plan (source)
Website	ocn.ne.jp
Facts checked	22 Sep 2026

OCN Mail integrations

OCN Mail lists 4 integrations on its own site.

IMAP
POP
SMTP
OCN App

Alternatives to OCN Mail

See all OCN Mail alternatives →

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used OCN Mail for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

OCN Mail is listed in our Personal Email Services directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update