Hh.iij4u.or.jp supports IMAP / SMTP
That means you don't have to use Hh.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 Hh.iij4u.or.jp Account with Your Email Program Using IMAP
To access your Hh.iij4u.or.jp email account from a desktop email program, you'll need the IMAP and SMTP settings below:
Hh.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 Hh.iij4u.or.jp password |
Hh.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 Hh.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. 💌
