Access your Bu.iij4u.or.jp (IIJ4U) Account from an Email Program using IMAP

Bu.iij4u.or.jp (IIJ4U) provides IMAP access to your Bu.iij4u.or.jp (IIJ4U) account, so you can connect to your email from mobile devices and desktop email clients.

 
 

Bu.iij4u.or.jp supports IMAP / SMTP

This means you don't have to use Bu.iij4u.or.jp's webmail interface! You can check your email and send messages using other email programs (like Mailspring, Outlook Express, Apple Mail, or Mozilla Thunderbird). Using desktop email applications can improve your workflow. They typically offer more options, and your email is still available on your computer when you're disconnected from the internet.

Setup Your Bu.iij4u.or.jp Account with Your Email Program Using IMAP

To access your Bu.iij4u.or.jp email account from a desktop email program, you'll need the IMAP and SMTP settings below:

Bu.iij4u.or.jp (IIJ4U) IMAP Server mbox.iij4u.or.jp
IMAP port993 or 143
IMAP securitySSL / TLS
IMAP usernameYour full email address
IMAP passwordYour Bu.iij4u.or.jp password
Bu.iij4u.or.jp (IIJ4U) SMTP Server mbox.iij4u.or.jp
SMTP port587
SMTP securitySTARTTLS
SMTP usernameYour full email address
SMTP passwordYour Bu.iij4u.or.jp password

Need a desktop email application? Mailspring is free, packed with great features, and you can try it alongside your existing email program. It's built with love for Mac, Linux, and Windows. 💌

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Learn how to do more with your Bu.iij4u.or.jp (IIJ4U) account

Have a different email provider?

Click your email provider below to learn how to connect to access your account with IMAP: