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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@mbox3.singnet.com.sg
abc@singnet.com.sg
abc@aaatech.com.sg
abc@singnet.com.sg
abc@mbox4.singnet.com.sg
abc@singnet.com.sg
abc@pacific.net.sg
abc@singnet.com.sg
abc@singnet.com.sg
abc@singnet.com.sg
abc@singnet.com.sg
abc@singnet.com.sg
abc@singnet.com.sg
abc@singnet.com.sg
abc@singnet.com.sg
abc@singnet.com.sg
abc@mbox3.singnet.com.sg
abc@singnet.com.sg
abc@singnet.com.sg
abc@singnet.com