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

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

Kk.iij4u.or.jp supports IMAP / SMTP

That means you don't have to use Kk.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 Kk.iij4u.or.jp Account with Your Email Program Using IMAP

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

Kk.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 Kk.iij4u.or.jp password
Kk.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 Kk.iij4u.or.jp password

Need a desktop email application?
Mailbird is the best email program for Windows and you can try it for free now. It works great with Windows 7, Windows 8 and Windows 10. 💌

Say hello to Mailbird
Enter your email to get the link and install in your desktop

Need more guidance?

Check our detailed instructions for your favorite email clients

Your full name
Your full email address
Step 1: To configure Kk.iij4u.or.jp On Mailbird Desktop Client, Enter your name and email address. Click Continue.
Step 1: Enter your name and email address. Click Continue.
Step 2: To configure Kk.iij4u.or.jp On Mailbird Desktop Client, Mailbird is automatically detecting your email settings. Click Continue.
Step 2: Mailbird is automatically detecting your email settings. Click Continue.
Step 3: To configure Kk.iij4u.or.jp On Mailbird Desktop Client, All set! You can Add more accounts or Start using Mailbird.
Step 3: All set! You can Add more accounts or Start using Mailbird.

Don't have Mailbird yet?

Mailbird might be able to detect server settings automatically for you.

Give it a try now

Step 1: To configure Kk.iij4u.or.jp On Gmail, In the top right corner, click Settings and See all settings.
Step 1: In the top right corner, click Settings and See all settings.
Step 2: To configure Kk.iij4u.or.jp On Gmail, Select Accounts and Import and then click on Add a mail account.
Step 2: Select Accounts and Import and then click on Add a mail account.
Your full email address
Step 3: To configure Kk.iij4u.or.jp On Gmail, Enter the email address you would like to add.
Step 3: Enter the email address you would like to add.
Step 4: To configure Kk.iij4u.or.jp On Gmail, Select one of the 2 options.
Step 4: Select one of the 2 options.
Your full email address
Your password
mbox.iij4u.or.jp
993
Step 5: To configure Kk.iij4u.or.jp On Gmail, Enter the following information to complete the email settings.
Step 5: Enter the following information to complete the email settings.

No time for Gmail?

Mailbird might be able to detect the server settings for Kk.iij4u.or.jp automatically from your email address.

Give it a try now

Step 1: To configure Kk.iij4u.or.jp On Outlook, Click on the File tab in the upper-left corner of the Outlook window.
Step 1: Click on the File tab in the upper-left corner of the Outlook window.
Step 2: To configure Kk.iij4u.or.jp On Outlook, Click Add Account
Step 2: Click Add Account.
Your full email address
Step 3: To configure Kk.iij4u.or.jp On Outlook, Enter your new email address and click Connect
Step 3: Enter your new email address and click Connect
Step 4: To configure Kk.iij4u.or.jp On Outlook, On the next screen, select IMAP
Step 4: On the next screen, select IMAP
mbox.iij4u.or.jp
993
SSL
mbox.iij4u.or.jp
587
TLS
Step 5: To configure Kk.iij4u.or.jp On Outlook, Add the following information and click Next
Step 5: Add the following information and click Next

No time for Outlook?

Mailbird might be able to detect the server settings for Kk.iij4u.or.jp automatically from your email address.

Give it a try now

Step 1: To configure Kk.iij4u.or.jp On Thunderbird, In Mozilla Thunderbird, from the menu select Account Settings
Step 1: In Mozilla Thunderbird, from the menu select Account Settings.
Step 2: To configure Kk.iij4u.or.jp On Thunderbird, In the bottom left corner, click Account actions and <strong>Add Mail Account...
Step 2: In the bottom left corner, click Account actions and Add Mail Account...
Your full name
Your full email address
Your password
Step 3: To configure Kk.iij4u.or.jp On Thunderbird, Enter your email address and click on Configure manually...
Step 3: Enter your email address and click on Configure manually...
mbox.iij4u.or.jp
993
SSL
mbox.iij4u.or.jp
587
TLS
Step 4: To configure Kk.iij4u.or.jp On Thunderbird, Add the following information and click Done
Step 4: Add the following information and click Done

No time for Thunderbird?

Mailbird might be able to detect the server settings for Kk.iij4u.or.jp automatically from your email address.

Give it a try now

Step 1: To configure Kk.iij4u.or.jp On Windows Mail, Click on the Setting icon in the bottom left.
Step 1: Click on the Setting icon in the bottom left.
Step 1: To configure Kk.iij4u.or.jp On Windows Mail, Click on Manage accounts
Step 2: Click on Manage accounts.
Step 1: To configure Kk.iij4u.or.jp On Windows Mail, Click on + Add account
Step 3: Click on + Add account.
Step 1: To configure Kk.iij4u.or.jp On Windows Mail, Click Advanced Setup
Step 4: Click Advanced Setup.
Step 1: To configure Kk.iij4u.or.jp On Windows Mail, Click on Internet email
Step 5: Click on Internet email.
Your full name
Your full email address
mbox.iij4u.or.jp
mbox.iij4u.or.jp
Step 1: To configure Kk.iij4u.or.jp On Windows Mail, Enter the following information in the different fields
Step 6: Enter the following information in the different fields.

No time for Windows Mail?

Mailbird might be able to detect the server settings for Kk.iij4u.or.jp automatically from your email address.

Give it a try now

Have a different email provider?

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

Bu.iij4u.or.jp (IIJ4U) Pp.iij4u.or.jp (IIJ4U) Hh.iij4u.or.jp (IIJ4U) Bc.iij4u.or.jp (IIJ4U) Iijmio-mail.jp (IJmio セーフティメール) X-il.jp (IJmio セーフティメール) Charter.com (Charter Commuications) Charter.net (Charter Commuications) Freenet.de (Freenet Mail) Gelsennet.de (Versatel)