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NTT DoCoMo Inc. said Wednesday that users of its i-mode mobile phone services will be able to automatically reject e-mail from any i-mode handset that sends 200 or more messages per day.

The antispam measure, to be offered by NTT DoCoMo and its eight regional subsidiaries, will begin Jan. 8, Japan’s biggest cell phone operator said.

On Oct. 20, NTT DoCoMo established a limit of 1,000 e-mails per i-mode handset to help combat spamming.

But as spammers have continued to abuse the system by restricting their daily quota of e-mails to the limit, NTT DoCoMo decided to lower the cap.

The new antispam feature will be the default setting for i-mode handsets, NTT DoCoMo said. Users can turn off the feature at the iMenu official i-mode portal site and there will be no packet transmission charge for changing the setting.

As of Oct. 28, NTT DoCoMo had suspended 1,875 contracts held by spammers.

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