Re: Upper case
Online, writing everything in capitals is certainly the equivalent of shouting. If you are going to write the letter by hand, it really depends on your handwriting. I have a friend who writes entirely in capital letters but his writing is very neat and quite stylised, so you almost don't notice the capital letters. However, as a general rule, regardless of whether you are writing by hand or on a computer, use the standard rules of upper and lower case lettering.
Originally Posted by silvergold
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.