[RolphyReyes]

Para validar Email.

Código Delphi [-]
function ValEmail(EMail: string): Boolean;
var
  s: string;
  ETpos: Integer;
begin
  if EMail<>'' then
  begin
      ETpos := pos('@', EMail);
      if ETpos > 1 then
      begin
        s := copy(EMail, ETpos + 1, Length(EMail));
        if (pos('.', s) > 1) and (pos('.', s) < length(s)) then
          Result := true
        else
          Result := false;
      end
      else
        Result := false;
    end else result:=true;
end;