I believe that companies and schools and councils etc should not be using Mr & Mrs Blogs as standard. Whoever procures the good or service or whoever is the primary contact for a school or for whatever reason correspondence is required should come first.
I choose Ms because I do not want to be categorized according to the archaic classification system of sexual status.
“Men might be thought of collectively as knights, merchants, crusaders; women were virgins, wives or widows” (Taken from Medieval Women by Henerietta Leyser).
A wife should no more take her husband’s name than he should hers.
My name is my identity and must not be lost.