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Note: 

The emails are given for an idea about domains and types of emails. The initial ID of email has been removed with (EMAIL) letters in these sample addresses 

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abc@a-amish.com
abc@dd.iij4u.or.jp
abc@symphony.plala.or.jp
abc@snow.ocn.ne.jp
abc@po1.oninet.ne.jp
abc@wisejp.net
abc@kb3.so-net.ne.jp
abc@asada-fudousan.co.jp
abc@cat.zero.ad.jp
abc@gaia.eonet.ne.jp
abc@ca.wakwak.com
abc@khaki.plala.or.jp
abc@ai.wakwak.com
abc@jcom.home.ne.jp
abc@f4.dion.ne.jp
abc@po.across.or.jp
abc@muc.biglobe.ne.jp