"Formal letter salutations typically begin with ""Dear"" followed by the addressee's name. Salutations are often used in both formal and informal correspondence. If names are not known the salutation is often followed by Sir/Madam. However, if the name is not known, it is recommended that an effort is made to find out the proper name of the addressee. If professional titles are known, they
. should be used for example, Doctor, Professor, Attorney. In the English language, the salutation is typically followed by a colon."
