Added CheckEmail() tests.
Added CheckEmail() tests.

crythias/otrs,mburggraf/otrs,linearregression/otrs,brandonshults01/otrs,muehlbauer/otrs,thorsteneckel/otrs,StCyr/otrs,nilei/otrs,nilei/otrs,muehlbauer/otrs,balazj/otrs,crythias/otrs,vlascoder/otrs,thorsteneckel/otrs,oiami/otrs,vlascoder/otrs,muehlbauer/otrs,xhoy/otrs,thorsteneckel/otrs,s7design/otrs,PortgasDAce/otrs,rudy500/otrs,xhoy/otrs,rudy500/otrs,MBRG/otrs,oiami/otrs,crythias/otrs,brandonshults01/otrs,StCyr/otrs,moritz/otrs,capeit-tto/otrs,brandonshults01/otrs,MBRG/otrs,brandonshults01/otrs,PortgasDAce/otrs,crythias/otrs,nilei/otrs,noritnk/otrs,crythias/otrs,PortgasDAce/otrs,mburggraf/otrs,eliasp/otrs,nilei/otrs,moritz/otrs,xhoy/otrs,MBRG/otrs,rudy500/otrs,balazj/otrs,oiami/otrs,rudy500/otrs,eliasp/otrs,StCyr/otrs,moritz/otrs,balazj/otrs,mburggraf/otrs,thorsteneckel/otrs,linearregression/otrs,brandonshults01/otrs,moritz/otrs,s7design/otrs,linearregression/otrs,noritnk/otrs,muehlbauer/otrs,moritz/otrs,MBRG/otrs,mbeijen/otrs-1,noritnk/otrs,eliasp/otrs,oiami/otrs,linearregression/otrs,thorsteneckel/otrs,PortgasDAce/otrs,capeit-tto/otrs,mburggraf/otrs,eliasp/otrs,balazj/otrs,capeit-tto/otrs,StCyr/otrs,s7design/otrs,mbeijen/otrs-1,oiami/otrs,vlascoder/otrs,mburggraf/otrs,s7design/otrs,muehlbauer/otrs,PortgasDAce/otrs,MBRG/otrs,eliasp/otrs,balazj/otrs,linearregression/otrs,nilei/otrs,xhoy/otrs,rudy500/otrs,xhoy/otrs,StCyr/otrs,mbeijen/otrs-1,s7design/otrs