Hiring someone does not mean that you have completely fulfilled your duties. It is of reasonable value that you should inform other people of your organisation, so they could be mentally prepared for settling in with a new face.
After you have hired a person, the most important task is to notify the rest of your staff, so the new recruit could attract reasonable attention on his first day at the new job.
Sometimes, this is seen as a difficult situation as in many cases the new recruit is replacement of someone or he is filling the vacant seat in your organisation.
It is of utmost importance that you should write the accurate email address of the person.
Now, make sure that you have addressed the person properly.
In the first paragraph, you must tell the staff about who is hired in the company and at what position.
In the second paragraph, you must give his full details including his qualification and experience in the past.
In the third paragraph, you must inform his date of joining, so that he would be welcomed properly.
Do not forget to give complete information about the person, so that your staff could have a brief introduction of him.