Prevent error message for emails with html body and no other attachments.
Prevent error message for emails with html body and no other attachments.

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