Freedom251 › Personal Email Services
So-net Mail
What So-net Mail is
So-net Mail is a browser-based email service for people with So-net email accounts. Users sign in with their So-net address and password, so they do not need to install or configure mail software on every device. It runs on the web, Windows, macOS, iOS, and Android, supporting PCs, smartphones, and tablets but not feature phones. The service sends and receives messages and offers folder and spam filtering; spam filtering requires a separate free application. Supported accounts include basic mail, PostPet, A-box, and So-net VAIO mail. Webmail messages remain for two months, while spam and trash are removed after 14 days. IMAP keeps mailbox state available across computers and smartphones, with a 3GB limit and no server-side search. Custom domains and aliases are supported. So-net lists a free webmail plan; other mailbox and IMAP services have no listed prices.
Who it suits
It suits So-net email account holders who want browser access across desktop and mobile devices. It also fits users needing aliases, custom domains, or IMAP synchronization.
What it does well
- Works on web, Windows, macOS, iOS, and Android
- No mail-software setup required on each device
- Supports custom domains and email aliases
- IMAP synchronizes mailbox state across devices
- Free webmail plan is listed
What to know first
- Feature phones are not supported
- IMAP mailboxes are limited to 3GB
- Server-side IMAP message search is unavailable
- Spam filtering needs a separate free application
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Basic Mailbox | Unlimited mailbox capacity · Unlimited stored messages · 2 months message retention | On request |
| IMAP Service | 3 GB storage · Unlimited stored messages · 2 years inbox, sent and draft retention · 14 days spam and trash retention | On request |
| So-net Webメール | 無料 · So-netメールアドレス利用者向け | Free |
| So-net IMAPサービス | 料金ページで金額を確認できませんでした · 3GB · 保存通数無制限 · 受信箱/送信箱/下書き2年間 · 作成フォルダ無期限 | On request |
As so-net.ne.jp lists them, read 22 Sept 2026. The maker's own page has the final word.
Verdict
So-net Mail provides straightforward browser email for existing So-net account holders, with broad device access and optional IMAP. Check its storage, retention, and search limits against your mailbox needs.
Facts from So-net Mail's own pages
- Email aliases
- Yes · so-net.ne.jp, 22 Sept 2026
- Audience
- The webmail service is for So-net email account holders and is accessible through a browser on supported devices. · so-net.ne.jp, 11 Oct 2026
- Custom domain
- Yes · so-net.ne.jp, 22 Sept 2026
- Email account compatibility
- So-net Webメール supports So-net-issued accounts including basic mail, PostPet, A-box, and So-net VAIO mail. · so-net.ne.jp, 11 Oct 2026
- Free plan
- Yes · so-net.ne.jp, 22 Sept 2026
- IMAP constraints
- IMAP mailboxes have a 3GB capacity limit, and server-side message search is not provided. · so-net.ne.jp, 11 Oct 2026
- IMAP use
- The IMAP service allows users to access the same mailbox state from multiple computers and smartphones. · so-net.ne.jp, 11 Oct 2026
- Mailbox storage
- 3 · so-net.ne.jp, 22 Sept 2026
- New account limit
- So-net states that it will stop issuing basic email addresses to new connection-service registrants from November 4, 2026; existing customers can continue using theirs. · so-net.ne.jp, 11 Oct 2026
- No setup
- Users can log in with their So-net email address and password without installing or configuring mail software on each device. · so-net.ne.jp, 11 Oct 2026
- Platform access
- web_mobile_desktop · so-net.ne.jp, 22 Sept 2026
- Purpose
- So-net Webメール lets users send and receive email on the web. · so-net.ne.jp, 11 Oct 2026
- Retention limit
- Webmail messages are retained for two months; spam and trash folder messages are automatically deleted after 14 days. · so-net.ne.jp, 11 Oct 2026
- Security transport
- So-net announced the end of support for TLS 1.0 and 1.1 for its email service. · so-net.ne.jp, 11 Oct 2026
- Spam control
- The free spam filtering service offers four spam sensitivity levels and configurable sender, recipient, and subject conditions. · so-net.ne.jp, 11 Oct 2026
- Support
- So-net Webmail help is available through the question mark icon in the webmail interface, with an FAQ linked from the service page. · so-net.ne.jp, 11 Oct 2026
- Supported devices
- The service supports PCs, smartphones, and tablets, but not feature phones. · so-net.ne.jp, 11 Oct 2026
- Webmail features
- The webmail service supports spam and folder filtering; spam filtering requires a separate free application. · so-net.ne.jp, 11 Oct 2026
Where So-net Mail stands on Freedom251
- Personal Email Services#65 of 115