Recently, I have received various kind emails to the email address I published in my column.

- mercari

We have detected that your Mercurial Account has been abused by a third party and your account has been restricted.

"I don't use Mercury"

- AEON CARD

We regret to inform you that we have restricted the use of some of your cards due to a transaction for which we would like to confirm whether the transaction was made by you or not.

"I don't have an AEON card"

- jcb card

Thank you for using JCB Card.

"I don't use a JCB card"

- J：COM

The payment due date has passed.

"The Ebata family's telecommunications infrastructure is not JCOM"

- mobile Suica

Due to credit failure, the Mobile Suica renewal process could not be completed.

"I am not using mobile SUICA"

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Purposely,

- From China (.cn domain)

- For services that I neither possess nor use.

- for your courteous warning.

I thank your cooperation, however,

"They are very annoying"

So, yesterday, I deleted all the e-mail addresses that I had published in my column.

I may revive it later, but I will leave it alone for a month or so.

If the error mail is delivered to the sender, it will not be resent.

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It is quite convenient to have a personal domain name (in my case "kobore.net") and an environment where you can add and delete a number of email addresses.

I also change my personal email address from time to time.

This is to smartly shake off senders who send meaningless e-mails.

Even if I don't respond, mailer-daemon responds with "User unknown" and there is no need for me to answer.

I have received many different emails, but even I am afraid of emails from people who send me text messages that sound like 'I can hear God's voice'.

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I remember that I once created an automatic mail response system that made it look like a reply from "mailer-daemon" only to a specific person.