Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

So-net Mail review

Freemium#88 of 115 in Personal Email Services

A practical So-net mailbox with IMAP, custom domains, and multi-device access.

6.0/10Editor score
Visit So-net Mail
So-net Mail6.0 Visit So-net Mail

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

So-net Mail is a personal email service for So-net connection subscribers. Its free Basic Mailbox provides a so-net.ne.jp address, webmail access, unlimited mailbox capacity, unlimited stored messages, and two-month message retention. Users can access mail on the web, Windows, macOS, iOS, and Android, while the service also supports forwarding, additional addresses, spam filtering, virus checking, blocking, and allowlists. Custom-domain email addresses are available as an optional service, making it relevant to individuals who want more control over their address setup.

The clearest upgrade is the IMAP Service, priced at ¥88/month. It adds IMAP access for desktop and mobile email clients, 3 GB of mailbox capacity, unlimited stored messages, and longer retention: two years for inbox, sent mail, and drafts, with indefinite retention for user-created folders. The published service details also identify Gmail and Outlook.com as integrations. Users who need a conventional multi-device setup should focus on this tier rather than the Basic Mailbox, since webmail access alone does not provide the same client flexibility.

So-net Mail fits solo users and small setups already connected to So-net services, especially those prioritizing custom domains, aliases, forwarding, and device flexibility. Its main trade-off is that the most useful multi-device feature is paid, while the free option is tied to eligible So-net connection customers and keeps messages for only two months. Buyers seeking a simple included mailbox may find Basic Mailbox sufficient; those needing IMAP should budget for the add-on and its 3 GB capacity.

So-net Mail pros and cons

  • Where it wins
    • IMAP access across web, desktop, and mobile devices
    • Custom-domain addresses, forwarding, aliases, and allowlists
    • Spam filtering and virus checking are available
  • Where it doesn't
    • The free mailbox is limited to So-net connection-course customers
    • IMAP access is an additional ¥88/month service
    • Basic Mailbox messages are retained for two months

So-net Mail fact sheet, pricing and score →

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated · How we research and update