[GitHub] [kafka-site] showuon opened a new pull request #268: MINOR: Make contact.html more clear

[GitBox]

showuon opened a new pull request #268:
URL: https://github.com/apache/kafka-site/pull/268


   In our `contact us` page, we said:
   > To subscribe, send an email to users-subscr...@kafka.apache.org. Once 
subscribed, send your emails to us...@kafka.apache.org.
   
   which will confuse users to let them send their **email address** to 
us...@kafka.apache.org, as below mailing thread showed.
   
   
![image](https://user-images.githubusercontent.com/43372967/84001508-59ce3c80-a999-11ea-8703-3afee40a9310.png)
   
   Rephrase this sentence to make it more clear:
   
![image](https://user-images.githubusercontent.com/43372967/84001869-16280280-a99a-11ea-9c32-054ed745bc8a.png)
   
   


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