Multiple e-mail notifications Marshmallow, can I get some help?

johnt1945

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Nov 26, 2013
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Multiple e-mail notifications Marshmallow

Hi, I have notification issues with my HTC M8.
When mail comes in I get a notification every 8 seconds for the same mail, this continues until I check mail. I have turned off play notification sound in my AOL and Hotmail accounts This has only happened since Marshmallow. Any help would be appreciated.