e-mail validation only at "com" or "com.cy"

Hi guys. I have a text field that keeps e-mail adresses. I have to validate it but my validate controls the dot that and of the mail address, I mean  xxx@xxx.com. is true for my validator.

my validator : \w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*

 so I dont want to  "." after the com, when I write the "." after "com" it may wrong.

Thanks alot.
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