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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@hotmail.com
abc@yahoo.com
abc@gmail.com
abc@alpha-general.com
abc@hklpg.org
abc@netvigator.com
abc@netvigator.com
abc@biznetvigator.com
abc@aap.org.hk
abc@chefoong.com.hk
abc@solgroup.net
abc@hk.china.com
abc@aaronhui.com
abc@acheung.com
abc@ccsee.com
abc@china.net
abc@hkonline.com