Condolence or sympathy email is written to a person who has lost something or someone with a view to let him know that you are sorry over the mishap and also that your support is there with the victim.
In the opening paragraph of your email, you should mention the reason that forced you to write your friend a condolence email. It can be the death of your friend’s relation and you should mention it in the opening paragraph.
In the following paragraph, you should mention that the deceased person’s good things that he or she had done to you in life. Include any experience that you have with the deceased person which will make it effective that you are also feeling sorry for the mishap and it will help in supporting your friend.
In this paragraph, you should let your friend know that you are with him and that he is not alone at this difficult time. Ensure him you support and also let him know that you are always there if he needs any help.
You should start the end your condolence email with proper salutations because it adds value to the write up and makes it well composed.