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

Nn.iij4u.or.jp (IIJ4U) provides IMAP access to your Nn.iij4u.or.jp (IIJ4U) account, so you can connect to your emails from your desktop email program or your mobile mail app.

Nn.iij4u.or.jp supports IMAP / SMTP

That means you don't have to use Nn.iij4u.or.jp webmail interface! You can check your emails using other email programs (like Mailbird, Microsoft Outlook or Mozilla Thunderbird). Using desktop email programs will make you more productive and your email will always be available, even offline.

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

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

Nn.iij4u.or.jp (IIJ4U) IMAP Server mbox.iij4u.or.jp
IMAP port 993
IMAP security SSL
IMAP username Your full email address
IMAP password Your Nn.iij4u.or.jp password
Nn.iij4u.or.jp (IIJ4U) SMTP Server mbox.iij4u.or.jp
SMTP port 587
SMTP security TLS
SMTP username Your full email address
SMTP password Your Nn.iij4u.or.jp password

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Have a different email provider?

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

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