No. 58of 116 ·Personal Email Services

So-net Mail

Web · Windows · Mac · Android · iPhone

Freedom report

Three barsScore 6.7

Free tierA free tier is on its own pricing page
Runs widely5 of 6 device platforms
DocumentedPlans, terms and facts published

So-net Mail is ranked #58 of 116 in personal email services on Freedom251. It runs on Android, iOS, macOS, Web, Windows. There is a free plan.

So-net Mail plans and pricing

All plans

Basic Mailbox Unlimited mailbox capacity · Unlimited stored messages · 2 months message retention so-net.ne.jp · 22 Sept 2026

IMAP Service 3 GB storage · Unlimited stored messages · 2 years inbox, sent and draft retention · 14 days spam and trash retention so-net.ne.jp · 22 Sept 2026

So-net Webメール Free 無料 · So-netメールアドレス利用者向け so-net.ne.jp · 11 Oct 2026

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 so-net.ne.jp · 11 Oct 2026

Compared on personal email services

Free plan: Yes
Mailbox storage: 3 GB
Custom domain: Yes
Email aliases: Yes
Platform access: web_mobile_desktop

Best So-net Mail alternatives

See all 20

Two bars Proton Mail Free tier No. 1Free8.3 Two bars Zoho Mail Free tier No. 2$0.08/mo8.3 Two bars Gmail Free tier No. 3$1.99/mo8.2 Two bars Outlook.com Free tier No. 4$1.99/mo8.1 Two bars eclipso Mail Europe Free tier No. 5€1.49/mo8.1 Two bars mail.ch Free tier No. 6CHF 3.49/mo8.0

The record

Purpose: So-net Webメール lets users send and receive email on the web.
No setup: Users can log in with their So-net email address and password without installing or configuring mail software on each device.
Webmail features: The webmail service supports spam and folder filtering; spam filtering requires a separate free application.
Supported devices: The service supports PCs, smartphones, and tablets, but not feature phones.
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.
Retention limit: Webmail messages are retained for two months; spam and trash folder messages are automatically deleted after 14 days.
IMAP use: The IMAP service allows users to access the same mailbox state from multiple computers and smartphones.
IMAP constraints: IMAP mailboxes have a 3GB capacity limit, and server-side message search is not provided.
Spam control: The free spam filtering service offers four spam sensitivity levels and configurable sender, recipient, and subject conditions.
Security transport: So-net announced the end of support for TLS 1.0 and 1.1 for its email service.
Support: So-net Webmail help is available through the question mark icon in the webmail interface, with an FAQ linked from the service page.
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.
Audience: The webmail service is for So-net email account holders and is accessible through a browser on supported devices.
Price from: Free

Where it ranks on Freedom251

Best Personal Email Services in 2026#58 of 116

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Sources

so-net.ne.jp/option/mail/webmail/· checked 11 Oct 2026
so-net.ne.jp/option/mail/imap/· checked 11 Oct 2026
so-net.ne.jp/option/security/meiwaku/· checked 11 Oct 2026
so-net.ne.jp/info/2023/op20230706_0027.html· checked 11 Oct 2026
so-net.ne.jp/info/2026/op20260930_0041.html· checked 11 Oct 2026
so-net.ne.jp/option/mail/basic/· checked 22 Sept 2026
so-net.ne.jp/option/mail/imap/price.html· checked 22 Sept 2026