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This line works to validate email address<br />

<pre><code id="code-10-29038821-1">=AND(ISERROR(FIND(&quot; &quot;,[Email Address],1)),IF(ISERROR(FIND(&quot;@&quot;,[Email Address],2)),FALSE,AND(ISERROR(FIND(&quot;@&quot;,[Email Address],FIND(&quot;@&quot;,[Email Address],2)+1)),IF(ISERROR(FIND(&quot;.&quot;,[Email Address],FIND(&quot;@&quot;,[Email Address],2)+2)),FALSE,FIND(&quot;.&quot;,[Email Address],FIND(&quot;@&quot;,[Email Address],2)+2)&lt;LEN([Email Address])))))</code></pre>
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But now I only want it to use above if email field is NOT empty. <br />
<br />
Can you help?
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This line works to validate email address
(CODE)

But now I only want it to use above if email field is NOT empty. 

Can you help?

Modify column validation SharePoint

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