Regarding the reception setting, even if it is not set by the customer himself / herself, it may be set from the time of purchase.
There are also cases where restrictions are imposed by providers. Please confirm whether it is applicable to the following.

• Your registered e-mail address is incorrect
• I set reception limit
• Mail from this site is moving to spam folder etc.
• Received mail folder, mailbox, etc. are over capacity
• Mail containing URL, mail sent from the system, automatic sent mail is refused reception
• You are using an email address containing a character string that is restricted in use
  [Example] Continuation of symbols (-_-), beginning with a symbol (- abc), etc.

In addition, customers who use the following e-mail address please refer further.

Please check the spam mail settings block setting.

» Click here for details

Please check Spam Entrust Regulation settings. (It may be set from the time of purchase)

For iPhone

Please turn off the iPhone Wi-Fi setting (Settings → Wi-Fi) and access the mail setting screen (https://set.mail.ezweb.ne.jp/md/signin).
Login with au ID and password → "Change e-mail address ・ Junk e-mail filter" → "Junk e-mail filter" → "Enter personal identification number" → "Individual setting" → "Spam e-mail restriction regulation"

» Click here for details

For smartphone

Launch the E-Mail application and select "E-mail Setting" → "Other Settings" → "OK" → "Junk E-mail Filter" → "Enter PIN Number" → "Individual Settings" → "Spam E-mail Random Regulation"

» Click here for details

Please check the spam folder setting.

» Click here for details

Please try the operation below.

After logging in, please click "Filter" from "Setting", proceed to "Create new folder", enter "@40iroiro.com" in From, then check "Do not put it as junk mail" from "next step" Please press "Create Filter".

» Click here for details