RegExp
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Title Case ^[A-Z][a-z@./'\\]*([ \-][A-Z][a-z@./'\\]*)*$ Upper or Title Case ^[A-Z][A-Za-z@./'\\]*([ \-][A-Z][A-Za-z@./'\\]*)*$ ^[A-Z][A-Za-z.']*([ /@\-\\][A-Z][A-Za-z.']*)*$ ^[A-Z][A-Za-z.]*([ .'/@\-/][A-Z][A-Za-z]*)*$ Upper or Title Case or Empty ^[A-Z][A-Za-z.']*([ /@\-\\][A-Z][A-Za-z.']*)*$|^$ ^[A-Z][A-Za-z.]*([ .'/@\-/][A-Z][A-Za-z]*)*$|^$
Email Address:
^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$
^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*\\.([a-zA-Z]{2,5})$
Email Address: (without % or \\%)
^[a-zA-Z0-9\\.\\!#$&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*\\.([a-zA-Z]{2,5})$